FCC ID: QISRRU3252B41 RRU3252 Remote Radio Unit

RRU3252 Compliance and Safety Manual Issue Date 01 2012-12-13 HUAWEI TECHNOLOGIES CO., LTD. Doc. Code Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website:

http://www.huawei.com Email:

support@huawei.com Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. i RRU3256 Compliance and Safety Manual Contents Contents 1 Regulatory Compliance Statement ......................................................................................... 1-1 1.1 About This Chapter ....................................................................................................................................... 1-1 1.2 European Community CE Certification DoC ................................................................................................ 1-1 2 Regulatory Compliance Information ..................................................................................... 2-1 2.1 About This Chapter ....................................................................................................................................... 2-1 2.2 Regulatory Compliance Standards ................................................................................................................ 2-1 2.3 European Directives Compliance .................................................................................................................. 2-3 2.4 CISPR 22 Compliance .................................................................................................................................. 2-4 3 Safety Information ..................................................................................................................... 3-1 3.1 About This Chapter ....................................................................................................................................... 3-1 3.2 Overview ....................................................................................................................................................... 3-1 3.2.1 Safety Precautions ................................................................................................................................ 3-1 3.2.2 General Requirements .......................................................................................................................... 3-2 3.3 Electricity Safety ........................................................................................................................................... 3-3 3.3.1 High Voltage ........................................................................................................................................ 3-3 3.3.2 Thunderstorm ....................................................................................................................................... 3-4 3.3.3 Tools ..................................................................................................................................................... 3-4 3.3.4 High Electrical Leakage ....................................................................................................................... 3-4 3.3.5 Power Cable ......................................................................................................................................... 3-4 3.3.6 Fuse ...................................................................................................................................................... 3-5 3.4 Electrostatic Discharge .................................................................................................................................. 3-5 3.5 Inflammable Environment ............................................................................................................................. 3-6 3.6 Radiation ....................................................................................................................................................... 3-6 3.6.1 Electromagnetic Field Exposure .......................................................................................................... 3-6 3.6.2 Laser..................................................................................................................................................... 3-9 3.7 Working at Heights ...................................................................................................................................... 3-11 3.7.1 Weight Lifting .................................................................................................................................... 3-11 3.7.2 Safety Guide on Ladder Use .............................................................................................................. 3-12 3.8 Mechanical Safety ....................................................................................................................................... 3-13 3.8.1 Drilling ............................................................................................................................................... 3-13 3.8.2 Sharp Objects ..................................................................................................................................... 3-13 3.8.3 Handling Fans .................................................................................................................................... 3-13 Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. ii RRU3256 Compliance and Safety Manual Contents 3.8.4 Lifting Heavy Objects ........................................................................................................................ 3-14 3.9 Miscellaneous .............................................................................................................................................. 3-14 3.9.1 Inserting and Removing a Board ........................................................................................................ 3-14 3.9.2 Bundling Signal Cables ...................................................................................................................... 3-14 3.9.3 Cabling Requirements ........................................................................................................................ 3-14 Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iii RRU3232 Compliance and Safety Manual 1 Regulatory Compliance Statement 1 Regulatory Compliance Statement 1.1 About This Chapter This chapter provides the certification details for RRU3252:

European Community CE Certification Declaration of Conformity (DoC) 1.2 European Community CE Certification DoC CE Certification Doc is not attached because this Compliance is for the United States only, Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1-1 RRU3232 Compliance and Safety Manual 2 Regulatory Compliance Information 2 Regulatory Compliance Information 2.1 About This Chapter The following table lists the contents of this chapter. Title Description 2.2 Regulatory Compliance Standards The regulatory compliance standards on EMC, safety, Laser Radiation, RF, health, and environmental protection. 2.3 European Directives Compliance The compliance with European directives, including RoHS compliance and device recycling guide. 2.3 European Directives Compliance The Japan regulatory compliance. 2.4 CISPR 22 Compliance The CISPR 22 regulatory compliance. 2.2 Regulatory Compliance Standards RRU3252 complies with the standards listed in Table 2-1. Table 2-1 Regulatory compliance standards Discipline Standards EMC

CISPR22 Class B

CISPR24

EN55022 Class B

EN55024

ETSI EN 301 489 Class B

CFR 47 FCC Part 15 Class B

ICES 003 Class B

AS/NZS CISPR22 Class B Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 2-1 RRU3232 Compliance and Safety Manual 2 Regulatory Compliance Information Discipline Safety Standards

GB9254 Class B

VCCI Class B

CNS 13438 Class B

IEC 60950-1 IEC60950-21 IEC60950-22 IEC60065 IEC/EN60215 IEC/EN41003

EN 60950-1

UL 60950-1

CSA C22.2 No 60950-1

AS/NZS 60950.1

BS EN 60950-1

IS 13252

GB4943

GB8898

UL50

UL60950-22 Laser safety

FDA rules, 21 CFR 1040.10 and 1040.11

IEC60825-1, IEC60825-2, EN60825-1, EN60825-2 RF Health

GB7247

CFR 47 FCC Part27

CFR 47 FCC Part90

IC RSS-Gen IC RSS-192 IC RSS-197

ETSI EN 301 908-1

ETSI EN 301 908-14

ETSI EN 301 908-20

ETSI EN 302 544-1

TELEC-T139

ICNIRP Guideline

1999-519-EC

EN 50385

OET Bulletin 65 IEEE Std C95.1

EN 60215 Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 2-2 RRU3232 Compliance and Safety Manual 2 Regulatory Compliance Information Discipline Standards Environmental protection RoHS Grounding

ITU-T K.27

ETSI EN 300 253 Note:

EMC: electromagnetic compatibility RF: radio frequency CISPR: International Special Committee on Radio Interference EN: European Standard ETSI: European Telecommunications Standards Institute CFR: Code of Federal Regulations FCC: Federal Communication Commission IEC: International Electrotechnical Commission AS/NZS: Australian/New Zealand Standard VCCI: Voluntary Control Council for Interference CNS: Chinese National Standard UL: Underwriters Laboratories CSA: Canadian Standards Association BS: British Standard IS: Indian Standard GR: general requirement FDA: Food and Drug Administration DBS: distribut transceiver station GSM: Global System for Mobile communications LTE: Long Term Evolution WiMAXWorldwide interoperability Microwave Access WLAN: wireless local area network ICNIRP: International Commission on Non-Ionizing Radiation Protection OET: Office of Engineering Technology IEEE: Institute of Electrical and Electronics Engineers RoHS: restriction of the use of certain hazardous substances 2.3 European Directives Compliance RRU3252 complies with the following European directives.

2004/108/EC (EMC) 2006/95/EC (low voltage) 1999/5/EC (R&TTE) Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 2-3 RRU3232 Compliance and Safety Manual 2 Regulatory Compliance Information RRU3252 complies with Directive 2002/95/EC, on the RoHS in electrical and electronic equipment. The device does not contain lead, mercury, cadmium, and hexavalent chromium and brominated flame retardants (polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE)) except for those exempted applications allowed by RoHS directive for technical reasons. RRU3252 complies with Directive 2002/96/EC on waste electrical and electronic equipment. Huawei is responsible for recycling its end-of-life devices. Contact Huawei local service center when recycling is required. The main materials in the device are steel, plastics, copper, and electronic components. Most of the materials are recyclable. Comply with the following rules for recycling at the end of life of the device. Power off the RRU.

Wear an ESD wrist strap or a pair of ESD gloves

Loosen the screw for protecting the cabling cavity on the cover plate by using the M4 screwdriver, and then open the cabling cavity of the RRU by lifting the handle on the cover plate.

Record all the cable connections on the panel of the board to be replaced.

Disconnect the cables from the ports in the cabling cavity and on the bottom panel.

Loosen the captive screws on the two contact pieces of the main bracket by using the M4 screwdriver

Use an M6 screwdriver to tighten the screw on the adapting piece of the RRU. Using the screw only for removing the RRU, loosen the connection between the adapting piece and the main bracket, and then lift the bottom of the RRU to remove the RRU Install a new RRU, and then waterproof the RRU Insert all the cables to be connected to the RRU, and then check that the idle cables trough in the cabling cavity are fitted with waterproof fillers.

Close the cover plate of the cabling cavity of the RRU, and then tighten the screw for protecting the cabling cavity on the cover plate until the tightening torque reaches 1.4 Nm. Power on the RRU.

2.4 CISPR 22 Compliance RRU3252 complies with CISPR 22 for Class B by the ITE. Class A ITE is a category of all other ITE that satisfies only the Class A ITE regulations, and not the Class B ITE regulations. Such equipment should not be restricted in its sale but the following warning shall be included in the instructions for use:

Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 2-4 RRU3232 Compliance and Safety Manual 3 Safety Information 3 Safety Information 3.1 About This Chapter The following table lists the contents of this chapter. Title 3.2 Overview Description Safety precautions to be taken before installing and maintaining the Huawei device. 3.3 Electricity Safety Information about the electricity safety. 3.4 Electrostatic Discharge Information about the electrostatic discharge safety. 3.5 Inflammable Environment Information about the inflammable environment safety. 3.6 Radiation 3.7 Working at Heights 3.8 Mechanical Safety 3.9 Miscellaneous Safety precautions on the Electromagnetic Field Exposure of the device and laser. Safety precautions to be taken before using the ladders or hoisting heavy objects. Safety precautions on drilling, on sharp objects, on handling fans, and on lifting heavy objects. Safety precautions on inserting and removing boards, on bundling signal cables, and cabling requirements. 3.2 Overview 3.2.1 Safety Precautions This section describes the safety precautions to be taken before installing and maintaining the Huawei device.

Before performing an operation, read the operation instructions and precautions to be taken, and follow them to prevent accidents. The Caution, Warning and Danger items in other documents do not cover all the safety precautions that must be followed. They are Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-1 RRU3232 Compliance and Safety Manual 3 Safety Information only supplementary information. The installation and maintenance personnel need to understand the basic safety precautions to be taken.

When operating the device, obey the local safety regulations. The safety precautions provided in the documents are supplementary and shall be in compliance with the local safety regulations.

When operating the Huawei device, in addition to the precautions, follow the specific

safety instructions given by Huawei. The installation and maintenance personnel must receive training in safety precautions. Only qualified personnel can install or maintain the device. 3.2.2 General Requirements To minimize the technically residual risk, it is imperative to obey the following rules. Read all the instructions before operation. For DC model: Reinforce insulation or double insulation must be provided to isolate DC source from the AC mains supply. Installation Ground The device (or system) must be installed or used in the access restricted location.

When installing the unit, always make the ground connection first and disconnect it at

the end. The device must be fixed securely on the floor or other reliable objects, such as the walls and the mounting racks before opera.

Do not damage the ground conductor or operate the device in the absence of well

installed ground conductor. Conduct the appropriate electrical inspection. The device (or system) must be connected permanently to the protection ground before an operation. The cross sectional area of protective ground conductor shall be at least 16 mm. Power Supply

For DC supplied model: The device applies to DC power source that complies with the Safety Extra-Low Voltage (SELV) requirements in IEC 60950-1 based safety standards. Prepared conductors are connected to the terminal block, and only appropriate AWG/Type of wire is secured in the listed lug terminals. This device relies on the buildings installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 80 VDC, 25 A for DC supplied model is used on the phase conductors (all current-carrying conductors). For this device, a readily accessible disconnect device shall be incorporated in the building installation wiring. To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord. Human Safety

Do not operate the device or cables at lightning strikes.

To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telecommunication network voltage (TNV) circuits. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-2 RRU3232 Compliance and Safety Manual 3 Safety Information

Do not look directly into the optical port to prevent the laser radiation from injuring your eyes.

Do not wear jewelry or watches when you operate the device. Operator

Only qualified and skilled personnel must install, configure, and disassemble the device.

Only the personnel authorized must operate the device.

Any replacement or change to the device or parts of the device (including the software) must be done by qualified or authorized personnel of Huawei.

Any fault or error that might cause safety problems must be reported immediately to the person in charge.

Only qualified personnel must remove or disable the safety facilities, or to troubleshoot and maintain the device. Ensure that the instructions provided in this document are followed completely. The document also provides guidelines in selecting the measuring and testing device. 3.3 Electricity Safety 3.3.1 High Voltage The high voltage power supply offers power for the device operation. Direct or indirect contact (through damp objects) with high voltage and AC mains supply may result in fatal danger.

During the installation of the AC power supply facility, follow the local safety regulations. The personnel who install the AC facility must be qualified to perform high voltage and AC operations.

Do not wear conductive articles, such as watches, hand chains, bracelets and rings during the operation.

When water is found in the rack or the rack is damp, switch off the power supply immediately.

When the operation is performed in a damp environment, make sure that the device is dry. Non-standard and improper high voltage operations may result in fire and electric shock. Therefore, you must obey the local rules and regulations when bridging and wiring AC cables. Only qualified personnel must perform high voltage and AC operations. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-3 RRU3232 Compliance and Safety Manual 3.3.2 Thunderstorm 3 Safety Information High voltage and AC operations, or operations on a steel tower and a mast are prohibited during thunderstorm. During thunderstorm, the electromagnetic field generated in the thunderstorm area may damage the electronic parts. To prevent damage to the device during lightning, ground the device properly. 3.3.3 Tools Suggestion: Dedicated tools must be used during high voltage and AC operations. Avoid using ordinary tools. 3.3.4 High Electrical Leakage Ground the device before powering on the device. Otherwise, the personnel and device are in danger. If the "high electrical leakage" flag is stuck to the power terminal of the device, you must ground the device before powering it on. 3.3.5 Power Cable Installation and removal of live line are prohibited. Transient contact between the core of the power cable and the conductor may generate electric arc or spark, which may cause fire or eye injury.

Before installing or removing the power cable, turn off the power switch.

Before connecting the power cable, confirm that the power cable and label comply with the requirements of the actual installation. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-4 RRU3232 Compliance and Safety Manual 3 Safety Information

For the DC power supplied device, use 3.3mm or 12AWG at least minimum power supply cord.

Use the type H03VV-F or light PVC sheathed flexible cord based on IEC 60227. 3.3.6 Fuse If a fuse is to be replaced, the new fuse shall be of the same type and specifications. Table 3-1 lists the fuses that will affect the safety of the device (or system). Use fuses according to this list. Table 3-1 Fuse description Position Manufacturer Type NA NA NA Rating NA 3.4 Electrostatic Discharge The static electricity generated by the human body may damage the electrostatic sensitive components on the circuit board, such as the large-scale integrated circuit (LSI). In the following situations, the human body will generate a static electromagnetic field:

Human body moving

Clothes friction

Holding ordinary plastic in hand Friction between shoes and the ground The static electromagnetic field will remain within the human body for a long time. Before touching the device, hand-operating parts, circuit boards, or ASICs, wear a grounded electrostatic discharge (ESD) wrist strap. It can prevent the sensitive components from damage by the static electricity in the human body. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-5 RRU3232 Compliance and Safety Manual 3 Safety Information Figure 3-1 shows the wearing of an ESD wrist strap. Figure 3-1 Wearing an ESD wrist strap 3.5 Inflammable Environment Operating the electrical device in inflammable environment can be fatal. Do not place the device in the environment that has inflammable and explosive air or fog. Do not perform any operation in this environment. 3.6 Radiation 3.6.1 Electromagnetic Field Exposure Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-6 RRU3232 Compliance and Safety Manual 3 Safety Information Radio-frequency signals with high intensity are harmful to human body. Before installing or maintaining an antenna in a steel tower or a mast with a large number of transmitter antennas, the operator should coordinate with the parties concerned to shut down the transmitter antennas. Introduction The BTS emits RF radiation (radiation hazard). Operators have to follow the related local regulations when erecting the BTS. Operators of BTSs must also follow the related local regulations when erecting the BTS. Limits and Guidelines on Exposure to Electromagnetic Fields There are a number of international regulations, standards and guidelines for exposure to electromagnetic fields. Several European countries have adopted the recommendation of the council of the European Union. It was released on July 12, 1999 focusing on the harmful effects of exposure to electromagnetic fields (1999/519/EC). The recommendation is based on the guideline published by the ICNIRP. Table 3-2 gives a comparison among regulations and reference levels applied in different countries. Table 3-2 Different regulations and reference Limit 950 MHz E Electric Field Strength 42 V/m Limit 950 MHz S Power Flux Density Limit 1850 MHz E Electric Field Strength Limit 1850 MHz S Power Flux Density 4.75 W/m2 59 V/m 9.25 W/m2 42 V/m 4.75 W/m2 59 V/m 9.25 W/m2 6 V/m 4 V/m 0.095 W/m2 6 V/m 0.095 W/m2 0.043 W/m2 6 V/m 0.096 W/m2 Country ICNIRP International Europe

(1999/519/EC) Italy, Decreto No. 381, 1998 Switzerland Verord. 1999 Reference levels are provided for exposure assessment, that is to determine whether the basic limit of restriction on exposure of humans to electromagnetic fields is exceeded. The basic restriction on exposure to electromagnetic fields is based on established health effects and biological considerations. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-7 RRU3232 Compliance and Safety Manual Location of Base Station Antennas 3 Safety Information Base station antennas, the source of the radiation, are usually mounted:

On freestanding towers, with a height up to 30 m, or

On a tower on the top of buildings, or

On rare occasion, to the side of the building. Generally, the height of the antenna position does not fall below 10 m. The power usually forms a horizontal main beam and is slightly tilted downward. The remaining power forms into the weaker beams on both sides of the main beam. The main beam, however, does not reach ground level until the distance from the antenna position is around 50200 m. The highest level of emission would be expected in close vicinity of the antenna and in line of sight to the antenna. Exclusion Zones The requirements for exclusion zones are as follows:

Antenna location should be designed so that the public cannot access the area where the

RF radiation exceeds the levels as described earlier. If areas, where the RF radiation exceeds the prescribed level, are accessible to the workers, make sure that workers know where these areas are, and that they can power off

(or shut down) the transmitters before entering these areas. Such areas may not exist; but if they do, they will be confined to areas within 10 m of the antennas. Each exclusion zone should be defined by a physical barrier and by a recognizable sign warning the public or workers. Guidelines on Arranging Antenna Sites The guidelines on arranging the antenna sites are as follows:

For roof-mounted antennas, raise the antennas above the height of the persons, who may have to work in the rooftop. For roof-mounted antennas, keep the transmitter antennas away from the areas where people are most likely to be, such as roof access points, telephone service points, and HVAC device. For roof-mounted directional antennas, place the antennas near the periphery, and do not make the antennas face to the building.

Consider the trade-off between large aperture antennas (lower maximum RF) and small aperture antennas (lower visual impact). Pay special attention to keep higher-power antennas away from accessible areas.

Keep the antennas in a site that is far away, though this may contradict the local zone requirements. Exercise extra caution when designing co-location sites, that is, where multiple antennas owned by different companies are located. This applies particularly to sites that include high-power broadcast (FM/TV) antennas. Local zone often favors co-location, but co-location may cause safety problems. Take special precautions for antenna sites near hospital and schools.

Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-8 RRU3232 Compliance and Safety Manual Location of Base Transceiver Station 3 Safety Information The base transceiver station (BTS) is shielded from RF radiation hazards. The device has been tested to comply with the radioactive spurious emission requirements of EN 301 502. These limits fall below the limits for RF radiation hazard. Therefore, the BTS does not cause danger to the public and workers under normal operation condition. However, it is still possible that because of imperfect antenna cables or other faults the limits set out above can be exceeded.

BTS sites shall not be accessible to the public. Only authorized and trained workers should access sites or rooms.

Doors of the site or room shall be clearly marked. For example, mark a sign warning the workers that inside the site or room where the RF radiation might exceed limits for radiation exposure.

BTS sites shall be regularly monitored and inspected after installation. Prediction of the Exposure to Electromagnetic Fields The section provides a theoretical approach to calculate possible exposure to electromagnetic radiation around a BTS antenna. Precise statements are possible either with measurements or complex calculations considering the complexity of the environment, such as soil conditions, nearby buildings and other obstacles. The complexity may cause reflections and deflection, scattering of electromagnetic fields. The maximum output power (given in EIRP) of a BTS is usually limited by license conditions of the network operator. RRU3252 supports the maximum output power of 20Wsingle channle A rough estimation of the expected exposure in power flux density on a given point can be made with the following equation:

=

S

)

(

GWP numeric 2 mr 4

) p*

(

P = Maximum output power in W G numeric = Numeric gain (see below) r = Distance between the antenna and the point of exposure in meters For the calculation of the Gain numeric:

G numeric GdB

=

G GdB 10

=

10 antenna

(

dB

) B cable

(

dB

) B vertical attenutati on

(

dB

) B horizontal attenuatio n

(

dB

) B = attenuation in dB So, the distance (r) should be more than 6.6 m as safety distance. 3.6.2 Laser The laser hazard level of this device is Class 1. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-9

*

*

-

-

-

-

-

RRU3232 Compliance and Safety Manual 3 Safety Information When handling optical fibers, do not stand close to, or look at the optical fiber outlet directly with unaided eyes. General Laser Information Laser transceivers or transmitters are used in the optical transmission system and associated test tools. The wavelength of the laser is between 780 nm and 1600 nm. Because the laser is transmitted through the optical fiber, it has very high power density and is invisible to human eyes. When a beam of light enters the eye, the retina may be damaged. Laser of wavelengths used in telecommunications can cause thermal damage to the retina. Lasers used in lightwave systems have a larger beam divergence, typically 10 to 20 degrees. Viewing an un-terminated fiber or damaged fiber with the unaided eye at distances greater than 150 mm (6 inches) will normally not cause eye injury. However, damage may occur if an optical tool such as a microscope, magnifying glass or eye loupe is used to view the energized fiber end. In its normal operating mode, a lightwave system is totally enclosed and presents no risk of eye injury. Additional safety is achieved by an automatic laser shut-down (ALS) of the system. The ALS, however, can be applied for bi-directional transmission only. If the receiver side does not detect the laser from the transmission side, it will give the transmission side a signal. Upon receiving the signal, the ALS will shut down the laser emission within 100 ms. Laser Safety Guidelines Read the following guidelines to avoid laser radiation:

Read the instructions before installing, operating and maintaining the device. Ignoring the instructions can cause exposure to dangerous laser radiation.

Wear a pair of eye-protective glasses when you are handling lasers or fibers.

All the operation shall be performed by personnel who have completed the approved training courses.

Make sure that the optical source is switched off before disconnecting optical fiber connectors.

Before opening the front door of an optical transmission system, make sure that you are not exposed to laser radiation.

Do not look at the end of an exposed fiber or an open connector when you are not sure whether the optical source is switched off or not.

Use an optical power meter to check and ensure that the optical source is switched off by measuring the optical power.

Do not use an optical tool such as a microscope, a magnifying glass or an eye loupe to view the optical connector or fiber. Handling Fibers Read the instructions before handling fibers.

Cutting and splicing fibers must be performed by the trained personnel only. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-10 RRU3232 Compliance and Safety Manual 3 Safety Information

Before cutting or splicing a fiber, ensure the fiber is disconnected from the optical source. After disconnecting the fiber, use protecting caps to protect all the optical connectors. 3.7 Working at Heights When working at heights, be careful to prevent objects from falling. When working at heights, shall comply with the following requirements.

The personnel who work at heights must be trained. The operating machines and tools shall be carried and handled safely to avoid falling. Safety protection measures, such as wearing a helmet and a safety belt, shall be taken. In cold regions, wear worm clothes when performing high-altitude operation.

All lifting appliances must be thoroughly checked before the work is started. 3.7.1 Weight Lifting Do not access the areas under the jib arm and the goods in suspension when lifting weight. Ensure the operators have completed the related training and are qualified.

Check the weight lifting tools and confirm that the tools are in good condition.

Lift the weight only when the weight lifting tools are firmly fixed onto the weight-bearing object or the wall.

Use a concise command to avoid incorrect operation.

Ensure the angle between the two cables is less than or equal to 90 degrees during the lift.

(see Figure 3-2). Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-11 RRU3232 Compliance and Safety Manual Figure 3-2 Weight lifting 3 Safety Information Maximum 90 3.7.2 Safety Guide on Ladder Use Checking the Ladder Before using the ladder, first check if the ladder is in good condition. Make sure that you know the maximum weight that the ladder can support; overweight on the ladder is strictly prohibited. Placing the Ladder Slant angle is suggested to be 75 degrees. The slant can be measured with the angle square or with arms. When using a ladder, place the wider end of the ladder on the ground. Otherwise, take protective measures on the base part of the ladder to avoid skidding. Place the ladder on stable ground. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-12 RRU3232 Compliance and Safety Manual Climbing the Ladder 3 Safety Information When climbing the ladder, note the following.

Ensure the gravity center of your body does not deviate from the ladder edge. To lessen the danger and ensure the safety, hold your balance on the ladder before any operation.

Do not climb higher than the forth highest step of the ladder.

If you are about to climb to the top, the length of the ladder shall be one meter higher than the eave. 3.8 Mechanical Safety 3.8.1 Drilling Drilling on the rack without permission is strictly prohibited. Drilling that does not satisfy the requirements concerned may damage the wires and cables inside the rack. If the metal shavings from the drilling fall into the rack, it may result in short circuit of the circuit boards.

Before drilling a hole on the rack, wear insulation gloves, and remove the cables inside the rack.

During the drilling, ensure that your eyes are well protected. The hot shavings may injury to your eyes. Ensure that the metal shavings do not get into the rack.

Non-standard drilling may damage the electromagnetic shielding performance of the rack.

After drilling, clean the metal shavings in time. 3.8.2 Sharp Objects When carrying the device by hand, wear protection gloves to avoid injury by sharp objects. 3.8.3 Handling Fans Ensure the following:

When replacing a component, place the component, screw, and tool at a safe place to prevent them from falling into the running fan. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-13 RRU3232 Compliance and Safety Manual 3 Safety Information

When replacing the ambient equipment around the fan, do not place the finger or board into the running fan until the fan is switched off and stops running. 3.8.4 Lifting Heavy Objects When lifting heavy objects, do not stand or walk under the arm or the lifted object. 3.9 Miscellaneous 3.9.1 Inserting and Removing a Board To insert or remove a board, abide by the following requirements:

When inserting a board, handle it gently to avoid distorting pins on the backplane.

Insert the board along the slot guide. The two sides of one board should not contact another board to avoid short-circuit or scratch.

When holding a board in hand, do not touch the board circuit, components, connectors, or connection slots. 3.9.2 Bundling Signal Cables

Bundle the signal cables separately from the strong current cables or high voltage cables.

Maintain a minimum space of 150 mm between adjacent ties. 3.9.3 Cabling Requirements At a very low temperature, movement of the cable may damage the plastic skin of the cable. To ensure the construction safety, comply with the following requirements:

When installing cables, ensure that the environment temperature is above 0C.

If cables are stored in the place below 0C, move the cables into a place at a room temperature and store the cables for more than 24 hours before installation. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-14 RRU3232 Compliance and Safety Manual 3 Safety Information

Move the cables with care, especially at a low temperature. Do not drop the cables directly from the vehicle. Issue 01 (2012-02-22) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3-15

DBS3900 V100R005C00 RRU3252/RRU3256 Hardware Maintenance Guide Issue Date Draft A 2012-11-30 HUAWEI TECHNOLOGIES CO., LTD. Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website:

Email:

http://www.huawei.com support@huawei.com Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. i DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide About This Document About This Document Purpose This document describes routine maintenance procedures for an RRU3252/RRU3256 (referred to as RRU in this document), such as equipment preventive maintenance and power-on and power-off operations. It also describes how to replace the RRU and optical modules. Product Version The following table lists the product version related to this document. Product Name DBS3900 LTE TDD Product Version V100R005C00 and later versions Intended Audience This document is intended for:

l System engineers l Site maintenance engineers Organization 1 Change History This chapter describes changes in the RRU3252/RRU3256 Hardware Maintenance Guide. 2 Preventive Maintenance Items for an RRU Preventive maintenance for an RRU improves RRU reliability. You are advised to perform scheduled maintenance yearly. 3 Powering On and Powering Off an RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. ii DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide About This Document After an RRU is powered on, the RRU indicator status and voltage must be checked. Before an RRU is powered off, you must decide whether to power off the RRU in a normal situation or an emergency based on onsite requirements. 4 Replacing an RRU A distributed base station consists of RRUs and a BBU. Replacing an RRU interrupts all the services carried by the RRU, and alarms are generated. 5 Replacing an Optical Module An optical module provides optical-electrical conversion ports, enabling optical transmission between an RRU and other devices. Optical cables inserted into an optical module must be removed before the optical module is replaced. Replacing an optical module interrupts CPRI signal transmission. Conventions Symbol Conventions The symbols that may be found in this document are defined as follows. Symbol Description Indicates a hazard with a high level of risk, which if not avoided, will result in death or serious injury. Indicates a hazard with a medium or low level of risk, which if not avoided, could result in minor or moderate injury. Indicates a potentially hazardous situation, which if not avoided, could result in equipment damage, data loss, performance degradation, or unexpected results. Indicates a tip that may help you solve a problem or save time. Provides additional information to emphasize or supplement important points of the main text. General Conventions The general conventions that may be found in this document are defined as follows. Convention Times New Roman Description Normal paragraphs are in Times New Roman. Boldface Italic Names of files, directories, folders, and users are in boldface. For example, log in as user root. Book titles are in italics. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iii DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide About This Document Description Examples of information displayed on the screen are in Courier New. Convention Courier New Command Conventions The command conventions that may be found in this document are defined as follows. Description The keywords of a command line are in boldface. Command arguments are in italics. Items (keywords or arguments) in brackets [ ] are optional. Optional items are grouped in braces and separated by vertical bars. One item is selected. Optional items are grouped in brackets and separated by vertical bars. One item is selected or no item is selected. Optional items are grouped in braces and separated by vertical bars. A minimum of one item or a maximum of all items can be selected. Optional items are grouped in brackets and separated by vertical bars. Several items or no item can be selected. Convention Boldface Italic

[ ]

{ x | y | ... }

[ x | y | ... ]

{ x | y | ... }*

[ x | y | ... ]*

GUI Conventions The GUI conventions that may be found in this document are defined as follows. Description Buttons, menus, parameters, tabs, window, and dialog titles are in boldface. For example, click OK. Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder. Convention Boldface

>

Keyboard Operations The keyboard operations that may be found in this document are defined as follows. Format Key Description Press the key. For example, press Enter and press Tab. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iv DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide About This Document Format Key 1+Key 2 Key 1, Key 2 Description Press the keys concurrently. For example, pressing Ctrl+Alt

+A means the three keys should be pressed concurrently. Press the keys in turn. For example, pressing Alt, A means the two keys should be pressed in turn. Mouse Operations The mouse operations that may be found in this document are defined as follows. Action Click Double-click Drag Description Select and release the primary mouse button without moving the pointer. Press the primary mouse button twice continuously and quickly without moving the pointer. Press and hold the primary mouse button and move the pointer to a certain position. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. v DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide Contents Contents About This Document.....................................................................................................................ii 1 Change History..............................................................................................................................1 2 Preventive Maintenance Items for an RRU..............................................................................2 3 Powering On and Powering Off an RRU..................................................................................4 3.1 Powering On an RRU.........................................................................................................................................5 3.2 Powering Off an RRU........................................................................................................................................6 4 Replacing an RRU.........................................................................................................................7 5 Replacing an Optical Module...................................................................................................10 Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. vi DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 1 Change History 1 Change History This chapter describes changes in the RRU3252/RRU3256 Hardware Maintenance Guide. Draft A (2012-11-30) This is a draft. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 2 Preventive Maintenance Items for an RRU 2 Preventive Maintenance Items for an RRU Preventive maintenance for an RRU improves RRU reliability. You are advised to perform scheduled maintenance yearly. DANGER While working at a high place, be careful not to drop any objects. Falling objects may cause serious injury or death. All maintenance personnel must wear a helmet and avoid standing in areas with a danger. The items listed in the following table are not mandatory but strongly recommended. Table 2-1 lists the preventive maintenance items for an RRU. Table 2-1 Preventive maintenance items for an RRU SN Checklist 1 All RRUs are properly installed and in good conditions. 2 3 4 5 6 7 8 9 10 11 12 Cables at the cable inlet of a cabinet are sealed properly. All RF cables are intact and free from any cracks, cuts, or other damage. All RF cable connectors are sealed properly. All RF cable conduits are in good conditions. All power cables are intact and free from any cracks, cuts, or other damage. All power cable connectors are in good conditions. All power cable conduits are in good conditions. All shield layers of power cables are in good conditions. All power cables are sealed properly. All CPRI fiber optic cables are intact and free from any cracks, cuts, or other damage. All screws are tightened on the cover plate of the maintenance cavity. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 2 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 2 Preventive Maintenance Items for an RRU SN Checklist 13 All optional RET cables are intact and free from any cracks, cuts, or other damage. Connectors of all optional RET cables are sealed properly. All optional alarm cables are securely installed and free from any damage. 14 15 If any of the statements in the checklist cannot be complied with, perform the following corrective actions:

1. 2. Report any other faults found when filling in the checklist to the supervisor, because only Tighten all connections. qualified or trained field engineers are permitted to climb towers for further repairs. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 3 Powering On and Powering Off an RRU 3 Powering On and Powering Off an RRU About This Chapter After an RRU is powered on, the RRU indicator status and voltage must be checked. Before an RRU is powered off, you must decide whether to power off the RRU in a normal situation or an emergency based on onsite requirements. 3.1 Powering On an RRU Set the corresponding circuit breaker on the auxiliary power device for the RRU to ON, and check the operating status of the RRU by observing the status of RRU indicators. 3.2 Powering Off an RRU You can power off an RRU either in a normal situation or an emergency. A normal situation refers to the cases such as equipment reparenting or anticipated interruption of regional mains supply. An emergency refers to the cases such as a fire, smoke, and water damage at the site. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 4 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 3 Powering On and Powering Off an RRU 3.1 Powering On an RRU Set the corresponding circuit breaker on the auxiliary power device for the RRU to ON, and check the operating status of the RRU by observing the status of RRU indicators. Prerequisites Context Procedure l The RRU hardware is installed and RRU cable connections are secure. l The input voltage of the RRU ranges from -32 V DC to -60 V DC. CAUTION After you unpack an RRU, you must power on it within 24 hours. If you power off the RRU for maintenance, you must restore power to the RRU within 24 hours. Step 1 Set the corresponding circuit breaker on the auxiliary power device for the RRU to ON to power on the RRU. DANGER Do not look into the optical module without eye protection after the RRU is powered on. Step 2 Keep the RRU running for three to five minutes to check the status of RRU indicators. For details, see RRU Indicators. NOTE If RRUs are cascaded, check the status of all RRU indicators. Step 3 Take corresponding actions based on the status of the indicators. If... The RRU is working properly The RRU is faulty Then... End the power-on check task. Set the circuit breaker to OFF. Rectify the fault, and then go to Step 1.

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 5 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 3 Powering On and Powering Off an RRU 3.2 Powering Off an RRU You can power off an RRU either in a normal situation or an emergency. A normal situation refers to the cases such as equipment reparenting or anticipated interruption of regional mains supply. An emergency refers to the cases such as a fire, smoke, and water damage at the site. Procedure l Power-off in a normal situation Set the corresponding circuit breaker on the auxiliary power device for the RRU to OFF. l Power-off in an emergency CAUTION Power-off in an emergency may damage the RRU, and do not use it in normal situations. 1. 2. Power off the auxiliary power device for the RRU. If time permits, set the corresponding circuit breaker on the auxiliary power device for the RRU to OFF.

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 6 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 4 Replacing an RRU 4 Replacing an RRU Prerequisites A distributed base station consists of RRUs and a BBU. Replacing an RRU interrupts all the services carried by the RRU, and alarms are generated. l The test UE communicates with the base station properly. l The types of faulty RRUs are confirmed as follows:

If RRUs can be queried online, run the DSP BRDMFRINFO command on the LMT to query the electronic labels of the RRUs. If RRUs cannot be queried online, the information about the RRUs can be queried offline on the M2000. For details, see the procedure for querying inventory data in the M2000 documentation. l Tools and materials, such as ESD gloves, M4 Phillips screwdrivers, M6 Phillips screwdrivers, waterproof tape, and PVC insulation tape, are ready. l The number of RRUs to be replaced are confirmed, and new RRUs are ready. Procedure Step 1 Run the BLK BRD command to block the RRU. Step 2 Power off the RRU by referring to 3.2 Powering Off an RRU. Step 3 Wear ESD gloves. CAUTION l Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to modules or electronic components. l Pay attention to the high temperature while replacing an RRU without housing. Step 4 Use an M4 Phillips screwdriver to loosen the protection screw on the cover plate of the RRU cabling cavity, and pull the handle outwards to open the cover plate. Step 5 Record the cable connections in the cabling cavity. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 7 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 4 Replacing an RRU Step 6 Disconnect cables from the cabling cavity and the bottom of the RRU. Step 7 Use an M4 Phillips screwdriver to loosen the captive screws on the two hoist clamps on the main mounting bracket, as shown in Figure 4-1. NOTE In scenarios where RRUs are installed in centralized mode, the RRU in the middle can be removed without removing the two RRUs on its right and left sides, in the same procedure as that for removing a single RRU. Figure 4-1 Loosening the screws on the main mounting bracket Step 8 Hold the RRU and move it upwards to remove it, as shown in Figure 4-2. Figure 4-2 Removing an RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 8 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 4 Replacing an RRU CAUTION When removing the RRU, hold the RRU handle with one hand, support the RRU bottom with the other hand, and move the RRU upwards. Step 9 Tighten the captive screws on the two hoist clamps on the main mounting bracket with a torque of 1.4 Nm (12.39 lbfin.). Step 10 Install a new RRU. Step 11 Install all required cables to the RRU and ensure that a waterproof block is inserted into each vacant cable trough in the cabling cavity. Step 12 Close the cover plate of the RRU cabling cavity, and then tighten the protection screw on the cover plate with a torque of 0.8 Nm (7.08 lbfin.). Step 13 Power on the RRU by referring to 3.1 Powering On an RRU. Step 14 Check the operating status of the new RRU by observing the status of RRU indicators. For details about the status of the indicators, see RRU Indicators. Step 15 Run the UBL BRD command to unblock the RRU. Step 16 Take off the ESD gloves, and pack up all the tools.

----End Follow-up Procedure l Place the removed RRU into the ESD box or bag. Then, place the ESD box or bag into a foam-padded carton or the packing box of the new RRU. l Fill in the fault form with detailed information about the removed component. l Contact the local Huawei office to handle the faulty component. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 9 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 5 Replacing an Optical Module 5 Replacing an Optical Module An optical module provides optical-electrical conversion ports, enabling optical transmission between an RRU and other devices. Optical cables inserted into an optical module must be removed before the optical module is replaced. Replacing an optical module interrupts CPRI signal transmission. Prerequisites Context l New optical modules are sufficient and the type of them is the same as that of the faulty ones based on the labels on optical modules. l The following tools and materials are available: M4 Phillips screwdriver, ESD gloves, and ESD box or bag. l Optical modules are hot-swappable when the same CPRI port is used. l It takes about 5 minutes to replace an optical module on the RRU, which involves removing fiber optic cables and a faulty optical module, installing a new optical module and the fiber optic cable, and waiting for CPRI links to recover. Procedure Step 1 Wear ESD gloves. CAUTION Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 2 Use an M4 Phillips screwdriver to loosen the protection screw on the cover plate of the RRU cabling cavity and then pull the handle outwards to open the cover plate. Step 3 Record the connections of the optical module and fiber optic cables. Step 4 Press the latch on the connector of the fiber optic cable, and then remove the connector from the faulty optical module. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 10 DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide 5 Replacing an Optical Module WARNING Do not look into the fiber optic cable and optical module without eye protection after the fiber optic cable is removed from the optical module. Step 5 Lower the puller on the faulty optical module, and then pull the puller until the optical module is removed from the RRU. Step 6 Install the new optical module on the RRU. NOTE An optical module to be replaced or installed must match the data transmission rate over a CPRI port. Step 7 Connect the fiber optic cable to the new optical module. Step 8 Observe the indicators near the CPRI0/IR0 and CPRI1/IR1 ports and check whether CPRI signal transmission is normal. For details about the indicator meanings, see RRU Indicators. Step 9 Reinstall the cables in the cabling cavity. Step 10 Close the cover plate of the RRU cabling cavity and then tighten the protection screw on the cover plate with a torque of 0.8 Nm (7.08 lbfin.). Step 11 Take off the ESD gloves and pack up all tools.

----End Follow-up Procedure l Place the removed optical module into an ESD box or bag. Then, place the ESD box or bag into a foam-padded carton or into the packing box of the new optical module. l Fill in the fault form with detailed information about the removed component. l Contact the local Huawei office to handle the faulty optical module. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 11

DBS3900 V100R005C00 RRU3252/RRU3256 Installation Guide Issue Date Draft A 2012-11-30 HUAWEI TECHNOLOGIES CO., LTD. Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website:

Email:

http://www.huawei.com support@huawei.com Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. i DBS3900 RRU3252/RRU3256 Installation Guide About This Document About This Document Purpose This document describes the process of installing a DC RRU3252/RRU3256 (referred to as RRU in this document). Product Version The following table lists the product version related to this document. Product Name DBS3900 LTE TDD Product Version V100R005C00 and later versions Intended Audience This document is intended for:

Base station installation engineers Organization 1 Change History This chapter describes changes in the RRU3252/RRU3256 Installation Guide. 2 Installation Preparations This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills that installation engineers must have. 3 Information About the Installation Before installing an RRU, you must be familiar with its exterior, ports, installation options, physical supports, and installation clearance requirements. 4 Unpacking the Equipment This chapter describes how to unpack and check the delivered equipment to ensure that all the materials are included and intact. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. ii DBS3900 RRU3252/RRU3256 Installation Guide 5 Installation Process About This Document The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU. 6 Hoisting the RRU and Cables onto a Tower This section describes how to hoist the RRU and Cables onto a tower and provides important notes about the installation. 7 Installing the RRU This chapter describes the procedure for installing the RRU. The RRU can be installed on a pole, U-steel, angle steel, or wall as required. 8 Installing RRU Cables This chapter describes the procedure for installing RRU cables. 9 Checking the RRU Hardware Installation This section describes how to check RRU hardware installation after the installation is complete. 10 Powering On an RRU This section describes how to check the power-on status of an RRU after all the devices are installed. 11 Appendix This section describes the procedure for adding an easy power receptacle (pressfit type) connector. Conventions Symbol Conventions The symbols that may be found in this document are defined as follows. Symbol Description Indicates a hazard with a high level of risk, which if not avoided, will result in death or serious injury. Indicates a hazard with a medium or low level of risk, which if not avoided, could result in minor or moderate injury. Indicates a potentially hazardous situation, which if not avoided, could result in equipment damage, data loss, performance degradation, or unexpected results. Indicates a tip that may help you solve a problem or save time. Provides additional information to emphasize or supplement important points of the main text. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iii DBS3900 RRU3252/RRU3256 Installation Guide General Conventions About This Document The general conventions that may be found in this document are defined as follows. Description Normal paragraphs are in Times New Roman. Names of files, directories, folders, and users are in boldface. For example, log in as user root. Book titles are in italics. Examples of information displayed on the screen are in Courier New. Convention Times New Roman Boldface Italic Courier New Command Conventions The command conventions that may be found in this document are defined as follows. Description The keywords of a command line are in boldface. Command arguments are in italics. Items (keywords or arguments) in brackets [ ] are optional. Optional items are grouped in braces and separated by vertical bars. One item is selected. Optional items are grouped in brackets and separated by vertical bars. One item is selected or no item is selected. Optional items are grouped in braces and separated by vertical bars. A minimum of one item or a maximum of all items can be selected. Optional items are grouped in brackets and separated by vertical bars. Several items or no item can be selected. Convention Boldface Italic

[ ]

{ x | y | ... }

[ x | y | ... ]

{ x | y | ... }*

[ x | y | ... ]*

GUI Conventions The GUI conventions that may be found in this document are defined as follows. Convention Boldface

>

Description Buttons, menus, parameters, tabs, window, and dialog titles are in boldface. For example, click OK. Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iv DBS3900 RRU3252/RRU3256 Installation Guide About This Document Keyboard Operations The keyboard operations that may be found in this document are defined as follows. Format Key Key 1+Key 2 Key 1, Key 2 Description Press the key. For example, press Enter and press Tab. Press the keys concurrently. For example, pressing Ctrl+Alt

+A means the three keys should be pressed concurrently. Press the keys in turn. For example, pressing Alt, A means the two keys should be pressed in turn. Mouse Operations The mouse operations that may be found in this document are defined as follows. Action Click Double-click Drag Description Select and release the primary mouse button without moving the pointer. Press the primary mouse button twice continuously and quickly without moving the pointer. Press and hold the primary mouse button and move the pointer to a certain position. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. v DBS3900 RRU3252/RRU3256 Installation Guide Contents Contents About This Document.....................................................................................................................ii 1 Change History..............................................................................................................................1 2 Installation Preparations..............................................................................................................2 2.1 Reference Documents.........................................................................................................................................3 2.2 Tools and Instruments........................................................................................................................................3 2.3 Skills and Requirements for Onsite Personnel...................................................................................................4 3 Information About the Installation...........................................................................................5 3.1 RRU Exterior......................................................................................................................................................6 3.2 RRU Ports...........................................................................................................................................................7 3.3 RRU Indicators...................................................................................................................................................8 3.4 Installation Options...........................................................................................................................................10 3.5 Installation Clearance Requirements of an RRU..............................................................................................15 3.5.1 Clearance for a Single RRU....................................................................................................................15 3.5.2 Clearance for Multiple RRUs..................................................................................................................17 3.5.3 Spacing Between RRUs...........................................................................................................................20 4 Unpacking the Equipment.........................................................................................................23 5 Installation Process.....................................................................................................................25 6 Hoisting the RRU and Cables onto a Tower..........................................................................26 6.1 Hoisting an RRU onto a Tower........................................................................................................................27 6.2 Hoisting Fiber Optic Cables onto a Tower.......................................................................................................31 6.3 Hoisting Power Cables onto a Tower...............................................................................................................33 7 Installing the RRU.......................................................................................................................37 7.1 Mounting Kits for an RRU...............................................................................................................................38 7.2 Installing the RRU on a Pole............................................................................................................................38 7.2.1 Installing a Single RRU...........................................................................................................................43 7.2.2 Installing Two RRUs...............................................................................................................................46 7.2.3 Installing Multiple RRUs.........................................................................................................................48 7.3 Installing the RRU on U-Steel..........................................................................................................................53 7.4 Installing the RRU on Angle Steel...................................................................................................................57 7.5 Installing the RRU on a Wall...........................................................................................................................60 Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. vi DBS3900 RRU3252/RRU3256 Installation Guide Contents 8 Installing RRU Cables................................................................................................................65 8.1 Cabling Requirements......................................................................................................................................67 8.2 Cable Connections............................................................................................................................................72 8.3 Installation Process...........................................................................................................................................75 8.4 RRU Cable List................................................................................................................................................76 8.5 Installing an RRU PGND Cable.......................................................................................................................78 8.6 Installing an RRU RF Jumper..........................................................................................................................79 8.7 Installing an RRU Alarm Cable........................................................................................................................82 8.8 Installing an RRU AISG Multi-Wire Cable and an RRU AISG Extension Cable...........................................83 8.9 Opening the Cover Plate of an RRU Cabling Cavity.......................................................................................86 8.10 Installing an RRU Power Cable......................................................................................................................88 8.11 Installing an Optical Fiber Cable ...................................................................................................................89 8.12 Closing the Cover Plate of an RRU Cabling Cavity......................................................................................91 9 Checking the RRU Hardware Installation..............................................................................94 10 Powering On an RRU...............................................................................................................95 11 Appendix.....................................................................................................................................97 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable...............................98 Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. vii DBS3900 RRU3252/RRU3256 Installation Guide 1 Change History 1 Change History This chapter describes changes in the RRU3252/RRU3256 Installation Guide. Draft A (2012-11-30) This is a draft. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1 DBS3900 RRU3252/RRU3256 Installation Guide 2 Installation Preparations 2 Installation Preparations About This Chapter This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills that installation engineers must have. 2.1 Reference Documents Before the installation, you must be familiar with reference documents. 2.2 Tools and Instruments All tools and instruments required for RRU installation must be ready before the installation. 2.3 Skills and Requirements for Onsite Personnel Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 2 DBS3900 RRU3252/RRU3256 Installation Guide 2 Installation Preparations 2.1 Reference Documents Before the installation, you must be familiar with reference documents. The following reference documents are required during RRU installation:

l RRU3252/RRU3256 Hardware Description l DBS3900 Installation Guide l OCB-01M User Guide This document describes the RRU installation on a pole, U-steel, angle steel, or wall. If RRUs are installed on the IFS06, the following reference document is required:

l DBS3900 (ICR) Installation Guide 2.2 Tools and Instruments All tools and instruments required for RRU installation must be ready before the installation. Hammer drill ( 12 bit to 14 bit) Electrostatic discharge

(ESD) gloves Vacuum cleaner Heat gun Phillips screwdriver (M3 to M6) Flat-head screwdriver (M3 to M6) Rubber mallet Hydraulic pliers Wire stripper Utility knife Cable cutter Level Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3 DBS3900 RRU3252/RRU3256 Installation Guide 2 Installation Preparations Adjustable wrench (capacity 32 mm) Torque screwdriver Torque socket Torque wrench Capacity: 17 mm, 21 mm, and 32 mm Combination wrench Capacity: 17 mm, 21 mm, and 32 mm 5 mm

(M3 to M6)

(M3 to M6) Multimeter Marker (diameter 10 mm) Measuring tape 2.3 Skills and Requirements for Onsite Personnel Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions. Before the installation, pay attention to the following items:

l The customer's technical engineers must be trained by Huawei and be familiar with the proper installation and operation methods. l The number of onsite personnel depends on the engineering schedule and installation environment. Generally, only three to five onsite personnel are necessary. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 4 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation 3 Information About the Installation About This Chapter Before installing an RRU, you must be familiar with its exterior, ports, installation options, physical supports, and installation clearance requirements. 3.1 RRU Exterior This section describes the exterior and dimensions of an RRU. 3.2 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. 3.3 RRU Indicators This section describes six indicators on an RRU. They indicate the running status. 3.4 Installation Options This section describes RRU installation options. An RRU can be installed on a pole, U-steel, angle steel, or wall. 3.5 Installation Clearance Requirements of an RRU This section describes the requirements for the installation clearance of a single RRU and multiple RRUs and the requirements for the installation spacing between RRUs. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 5 DBS3900 RRU3252/RRU3256 Installation Guide 3.1 RRU Exterior 3 Information About the Installation This section describes the exterior and dimensions of an RRU. Figure 3-1 shows an RRU. Figure 3-1 RRU exterior Figure 3-2 shows RRU dimensions. Figure 3-2 RRU dimensions Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 6 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation 3.2 RRU Ports This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Figure 3-3 shows the ports on the RRU panels. Figure 3-3 Ports on the RRU panels Table 3-1 describes ports and indicators on the RRU panels. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 7 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Table 3-1 Ports and indicators on the RRU panels Description TX/RX ports. ANT0 port supports RET signal transmission. Communication port for the RET antenna or port for alarm reporting, supporting RET signal transmission RGPS port, which is optional. Optical port Power supply socket For details, see 3.3 RRU Indicators. Item

(1) Ports at the bottom ANT0-ANT3 Label RET/EXT_ALM

(2) Ports in the cabling cavity

(3) Indicators RGPS CPRI0/IR0 CPRI1/IR1 RTN(+) NEG(-) RUN ALM ACT VSWR CPRI0/IR0 CPRI1/IR1 NOTE If only two RF ports are required, ANT0 and ANT1 are used by default. The RET ports to be used are determined by the software configuration. 3.3 RRU Indicators This section describes six indicators on an RRU. They indicate the running status. For the specific positions of RRU indicators, see 3.2 RRU Ports. Table 3-2 describes RRU indicators. Table 3-2 Indicators on the RRU Label RUN Color Green Status Steady on Steady off Description There is power supply, but the module is faulty. There is no power supply, or the module is faulty. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 8 DBS3900 RRU3252/RRU3256 Installation Guide Label Color 3 Information About the Installation Status Blinking on for 1s and off for 1s Description The module is working properly. Blinking on for 0.125s and off for 0.125s Software is being loaded to the module, or the module is not started. ALM Red Steady on Alarms are generated, and the module must be replaced. Steady off No alarm is generated. Blinking on for 1s and off for 1s ACT Green Steady on Alarms are generated. The alarms may be caused by the faults on the related modules or ports. Therefore, the necessity for module replacement is uncertain. The module is working properly with TX channels enabled or software is being loaded without RRU running. Blinking on for 1s and off for 1s The module is working properly with TX channels disabled. VSWR Red CPRI0/

IR0 Red or green Steady off Steady on Steady green Steady red Blinking red on for 1s and off for 1s CPRI1/

IR1 Red or green Steady off Steady green Steady red No VSWR alarm is generated. A VSWR alarm is generated. The CPRI link is functioning properly. An optical module fails to transmit or receive signals possibly because the optical module is faulty or the optical fiber cable is broken. The CPRI link is out of lock possibly because of mutual lock of dual-mode clock sources or mismatched data rates over CPRI ports. (You are advised to check the system configuration to rectify the fault.) The SFP module is not properly installed, or the optical module is powered off. The CPRI link is functioning properly. An optical module fails to transmit or receive signals possibly because the optical module is faulty or the optical fiber cable is broken. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 9 DBS3900 RRU3252/RRU3256 Installation Guide Label Color Status Blinking red on for 1s and off for 1s Steady off 3.4 Installation Options 3 Information About the Installation Description The CPRI link is out of lock possibly because of mutual lock of dual-mode clock sources or mismatched data rates over CPRI ports. (You are advised to check the system configuration to rectify the fault.) The SFP module is not properly installed, or the optical module is powered off. This section describes RRU installation options. An RRU can be installed on a pole, U-steel, angle steel, or wall. Installing an RRU on a Pole Figure 3-4 shows the diameter of a metal pole for installing an RRU. Figure 3-4 Diameter of a pole CAUTION l The diameter of a pole for installing an RRU ranges from 60 mm to 114 mm (2.36 in. to 4.49 in.). The recommended diameter is 80 mm (3.15 in.). l If the diameter of a pole ranges from 60 mm to 76 mm (2.36 in. to 2.99 in.), a maximum of three RRUs can be installed on the pole and the side-mounted installation must not be adopted. l If three or more RRUs must be installed on a pole in centralized mode, the diameter of the pole must range from 76 mm to 114 mm (2.99 in. to 4.49 in.). l The recommended pole thickness is 3.5 mm (0.14 in.) or thicker. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 10 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-5 shows an RRU installed on a pole. Figure 3-5 RRU installed on a pole Installing an RRU on U-steel CAUTION l You are advised to install only one RRU on the same U-steel or angle steel. l The angle between the vertical plane and the pole, angle steel, or U-steel must be smaller than or equal to 10, as shown in Figure 3-6. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 11 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-6 Requirement of the angle between the ground and the pole, angle steel, or U-steel

(1) RRU

(2) Pole, angle steel, or U-steel Figure 3-7 shows U-steel specifications. Figure 3-7 U-steel specifications Figure 3-8 shows an RRU installed on U-steel. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 12 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-8 RRU installed on U-steel Installing an RRU on Angle Steel Figure 3-9 shows angle steel specifications. Figure 3-9 Angle steel specifications CAUTION l It is recommended that only one RRU be installed on one angle steel. l The vertical deviation angle of angle steel must be less than or equal to 10, as shown in Figure 3-6. Figure 3-10 shows an RRU installed on angle steel. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 13 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-10 RRU installed on angle steel Installing an RRU on a Wall The wall on which RRUs are installed must meet the following requirements:

l When a single RRU is installed, the wall has a capacity of bearing at least four times the weight of the RRU. l Expansion bolts must be tightened with a torque of 30 Nm (265.52 lbfin.) to ensure the bolts work properly and the wall remains intact without cracks in it. CAUTION The brackets must not be combined when RRUs are installed on a wall. Figure 3-11 shows an RRU installed on a wall. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 14 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-11 RRU installed on a wall 3.5 Installation Clearance Requirements of an RRU This section describes the requirements for the installation clearance of a single RRU and multiple RRUs and the requirements for the installation spacing between RRUs. NOTE The recommended installation clearance ensures normal running and provides an appropriate space for OM. If there is sufficient space, leave the recommended installation clearance. The minimum installation clearance ensures normal running and heat dissipation, but OM activities such as checking indicator status and opening the maintenance cavity cannot be properly conducted. If the installation space is restricted, leave the minimum installation clearance. 3.5.1 Clearance for a Single RRU This section describes the recommended and minimum clearance for a single RRU. Recommended Clearance for a Single RRU Figure 3-12 shows the recommended clearance for a single RRU. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 15 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-12 Recommended clearance for a single RRU Minimum Clearance for a Single RRU Figure 3-13 shows the minimum clearance for a single RRU. Figure 3-13 Minimum clearance for a single RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 16 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Minimum Clearance for a Single RRU Installed on a Tower Figure 3-14 shows the minimum clearance for a single RRU installed on a tower. Figure 3-14 Minimum clearance for a single RRU installed on a tower 3.5.2 Clearance for Multiple RRUs This section describes the recommended and minimum clearance for multiple RRUs. Recommended Clearance for Multiple RRUs Installed in Centralized Mode Figure 3-15 shows the recommended clearance for multiple RRUs installed in centralized mode. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 17 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Figure 3-15 Recommended clearance for multiple RRUs installed in centralized mode Minimum Clearance for Multiple RRUs Installed in Centralized Mode Figure 3-16 shows the minimum clearance for multiple RRUs installed in centralized mode. Figure 3-16 Minimum clearance for multiple RRUs installed in centralized mode Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 18 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Recommended clearance for multiple RRUs installed on a wall in standard mode Figure 3-17 shows the recommended clearance for multiple RRUs installed on a wall in standard mode. Figure 3-17 Recommended clearance for multiple RRUs installed on a wall in standard mode Minimum clearance for multiple RRUs installed on a wall in standard mode Figure 3-18 shows the minimum clearance for multiple RRUs installed on a wall in standard mode. Figure 3-18 Minimum clearance for multiple RRUs installed on a wall in standard mode Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 19 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Recommended Clearance for Multiple RRUs Side-Mounted on a Wall Figure 3-19 shows the recommended clearance for multiple RRUs side-mounted on a wall. Figure 3-19 Recommended clearance for multiple RRUs side-mounted on a wall 3.5.3 Spacing Between RRUs This section describes the horizontal and vertical installation spacing between RRUs. Recommended horizontal spacing between RRUs Figure 3-20 shows the recommended horizontal spacing between RRUs. Figure 3-20 Recommended horizontal spacing between RRUs Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 20 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Minimum horizontal spacing between RRUs Figure 3-21 shows the minimum horizontal spacing between RRUs. Figure 3-21 Minimum horizontal spacing between RRUs Recommended vertical spacing between RRUs Figure 3-22 shows the recommended vertical spacing between RRUs. Figure 3-22 Recommended vertical spacing between RRUs Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 21 DBS3900 RRU3252/RRU3256 Installation Guide 3 Information About the Installation Minimum vertical spacing between RRUs Figure 3-23 shows the minimum vertical spacing between RRUs. Figure 3-23 Minimum vertical spacing between RRUs Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 22 DBS3900 RRU3252/RRU3256 Installation Guide 4 Unpacking the Equipment 4 Unpacking the Equipment This chapter describes how to unpack and check the delivered equipment to ensure that all the materials are included and intact. Context NOTE When transporting, moving, or installing the equipment, components, or parts, you must:

l l Wear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweat-

Prevent them from colliding with doors, walls, shelves, or other objects. soaked gloves, or dirty gloves. CAUTION l After a cabinet or an BBU is unpacked, it must be powered on within 7 days. l After an RRU is unpacked, it must be powered on within 24 hours. Procedure Step 1 Check the total number of articles in each case according to the packing list. If ... Then ... The total number tallies with the packing list Go to Step 2. The total number does not tally with the packing list Find out the cause and report any missing articles to the local Huawei office. Step 2 Check the exterior of the packing case. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 23 DBS3900 RRU3252/RRU3256 Installation Guide 4 Unpacking the Equipment If ... Then ... The outer packing is intact Go to Step 3. The outer packing is severely damaged or soaked Find out the cause and report it to the local Huawei office. The shockwatch label is red Stop unpacking the wooden crate, and then report it to the transportation company. Step 3 Check the type and quantity of the equipment in the cases according to the packing list. If ... Then ... Types and quantity of the article tally with those on the packing list Sign the Packing List with the customer. Either shipment shortage, wrong shipment or damaged articles. Report to the local Huawei office. WARNING To protect the equipment and prevent damage to the equipment, you are advised to keep the unpacked equipment and packing materials indoors, take photos of the stocking environment, packing case or carton, packing materials, and any rusted or eroded equipment, and then file the photos.

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 24 DBS3900 RRU3252/RRU3256 Installation Guide 5 Installation Process 5 Installation Process The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU. Figure 5-1 shows the process of installing an RRU. Figure 5-1 Process of installing an RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 25 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower 6 Hoisting the RRU and Cables onto a Tower About This Chapter This section describes how to hoist the RRU and Cables onto a tower and provides important notes about the installation. 6.1 Hoisting an RRU onto a Tower This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenario, the RRU can be installed on a pole, U-steel, or angle steel. 6.2 Hoisting Fiber Optic Cables onto a Tower This section describes the procedure for hoisting fiber optic cables onto a tower and the precautions that must be taken. 6.3 Hoisting Power Cables onto a Tower This section describes the procedure for hoisting power cables onto a tower and the precautions that must be taken. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 26 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower 6.1 Hoisting an RRU onto a Tower This section describes the procedures and precautions for hoisting an RRU and its mounting kits onto a tower. In tower-mounted scenario, the RRU can be installed on a pole, U-steel, or angle steel. Prerequisites Procedure Place a foam pad or cardboard on the ground to protect the housing of the RRU from damage before the binding. Do not stand the RRU upright because the load-bearing capacity of the RF ports at the RRU bottom is low. CAUTION When installed on a tower, only one RRU can be installed in standard mode or reverse mode, and two RRUs can be installed on a pole in back-to-back mode. RRUs cannot be installed on a tower with its side mounted, and the brackets for more than two RRUs cannot be combined. Step 1 Hoist the RRU and mounting kits onto the tower respectively, as shown in Figure 6-1. NOTE Hoist mounting kits onto the tower and then install the mounting kits before hoisting the RRU onto the tower. When hoisting the mounting kits and RRU, protect them from colliding with the tower. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 27 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-1 Hoisting the RRU onto the tower

(1) Lifting sling

(2) Fixed pulley

(3) Traction sling 1. After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley. Installation engineer C binds the RRU mounting kits properly using a lifting sling, as shown in Figure 6-2, and binds the RRU using a lifting sling and a traction sling, as shown in Figure 6-3. 2. Figure 6-2 Binding mounting kits for the RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 28 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-3 Binding the RRU

(1) Lifting sling

(2) Lifting eye

(3) Traction sling

(4) Handle CAUTION l The load-bearing capacity of each sling must be greater than 200 kg (441 lb) and the diameter of each sling must be less than 25 mm (0.98 in.). The angle at the top of the lifting sling [by the knot] must not be greater than 60 degrees. l When hoisting the RRU and mounting kits onto the tower, protect them from colliding with the ground and tower. l Hoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel. l Do not hoist the RRU by the handle or lifting eye only, as shown in Figure 6-4 and Figure 6-5. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 29 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-4 Incorrect binding method Figure 6-5 Incorrect binding method 3. Installation engineer B pulls the lifting sling downwards, and installation engineer C pulls the traction sling outwards to protect the RRU from colliding with the tower. Step 2 Installation engineer A catches the RRU, install the RRU on the main bracket until the RRU snaps shut. Step 3 Remove the lifting sling and traction sling. NOTE The procedure for hoisting the RRU and mounting kits onto the tower is for your reference only.

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 30 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower 6.2 Hoisting Fiber Optic Cables onto a Tower This section describes the procedure for hoisting fiber optic cables onto a tower and the precautions that must be taken. Context Procedure Cabling requirements for power cables are met. For details, see Cabling Requirements. Step 1 Hoist the fiber optic cables onto the tower, as shown in Figure 6-6. Figure 6-6 Hoisting fiber optic cables onto the tower

(1) Lifting sling

(2) Fixed pulley

(3) Traction sling CAUTION Before hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RRU or BBU based on the labels on both ends of the cables and determine the hoisting direction. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 31 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower 2. 1. After climbing up to the tower, installation engineer A secures the fixed pulley to the tower platform support and leads the lifting sling through the fixed pulley. Installation engineer B places the fiber coiler for coiling fiber optic cables on the fiber spools, and installation engineer D lead the lifting sling through the stretch sling of the fiber optic cables and use the other sling as a traction sling to secure the cables 4 m (13.12 ft) away from the lifting sling, as shown in Figure 6-7. Figure 6-7 Binding fiber optic cables

(1) Lifting sling

(2) Stretch sling

(3) Traction sling CAUTION Do not remove the stretch sling and protection pipe or bind fiber optic cables using one sling, as shown in Figure 6-8. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 32 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-8 Incorrect binding method 3. 4. Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m (49.21 ft) per minute to coil the fiber optic cables. Installation engineer C pulls the lifting sling downwards, and installation engineer D pulls the traction sling outwards to protect the fiber optic cables from colliding with the tower. Step 2 Secure the fiber optic cables to the tower vertically using cable clips. Step 3 Remove the lifting sling, traction sling, and protection pipe. NOTE The procedure for hoisting the fiber optic cables onto the tower is for your reference only.

----End 6.3 Hoisting Power Cables onto a Tower This section describes the procedure for hoisting power cables onto a tower and the precautions that must be taken. Context Procedure Cabling requirements for power cables are met. For details, see Cabling Requirements. The procedure for adding a connector to the RRU power cable on the RRU side is done under the tower. Step 1 Hoist the power cables onto the tower, as shown in Figure 6-9. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 33 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-9 Hoisting power cables onto the tower

(1) Lifting sling

(2) Fixed pulley 1. After climbing up to the tower, installation engineer A secures the fixed pulley to the tower 2. platform support and leads the lifting sling through the fixed pulley. Installation engineer B secures three cable ties to the power cable connector, and then secures the power cable to the lifting sling, as shown in Figure 6-10. NOTE The connector on the power cable in the figure is only an example. The actual connector may vary according to the situation. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 34 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-10 Binding cable ties 3. Installation engineer B wraps the power cable connector with a layer of PVC insulation tape, as shown in Figure 6-11. NOTE Wrap the PVC insulation tape from 30 mm (1.18 in.) away from one end of the connector until it reaches the other end of the connector. The total length of the wrapped connector is 100 mm (3.94 in.). Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 35 DBS3900 RRU3252/RRU3256 Installation Guide 6 Hoisting the RRU and Cables onto a Tower Figure 6-11 Wrapping the PVC insulation tape 4. Installation engineer C pulls the lifting sling downwards, and installation engineer B pulls the other end of the lifting sling outwards to protect the power cables from colliding with the tower. Step 2 Secure the power cables to the tower vertically using cable clips. Step 3 Remove the cable ties, PVC insulation tape, and lifting sling. NOTE The procedure for hoisting the power cables onto the tower is for your reference only.

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 36 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU 7 Installing the RRU About This Chapter This chapter describes the procedure for installing the RRU. The RRU can be installed on a pole, U-steel, angle steel, or wall as required. CAUTION l Do not stand the RRU upright because the load-bearing capacity of the RF ports at the RRU bottom is low. l Place a foam pad or cardboard under an RRU to protect the RRU housing from damage during the installation. 7.1 Mounting Kits for an RRU This section describes the bracket assembly and the attachment plate for an RRU. 7.2 Installing the RRU on a Pole This section illustrates the installation of one or more RRUs on a pole. 7.3 Installing the RRU on U-Steel This section describes the procedure for installing the RRU on U-steel and the precautions that must be taken during the installation. The RRU installed on U-steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on U-steel. 7.4 Installing the RRU on Angle Steel This section describes the procedure for installing the RRU on angle steel and the precautions that must be taken during the installation. The RRU installed on angle steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on angle steel. 7.5 Installing the RRU on a Wall This section describes the procedure for installing the RRU on a wall and the precautions that must be taken during the installation. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 37 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU 7.1 Mounting Kits for an RRU This section describes the bracket assembly and the attachment plate for an RRU. Figure 7-1 shows the bracket assembly for an RRU. Figure 7-1 Bracket assembly for an RRU

(1) Plastic screw cap (2) M10 nut

(3) Spring washer

(4) Flat washer

(5) M10x150 bolt

(6) Auxiliary mounting bracket

(7) Hoist clamp on the main mounting bracket

(8) Main mounting bracket Figure 7-2 shows the rear view of an RRU. Figure 7-2 Rear view of an RRU

(1) Attachment plate 7.2 Installing the RRU on a Pole This section illustrates the installation of one or more RRUs on a pole. Figure 7-3 shows a single RRU installed on a pole. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 38 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-3 Single RRU installed on a pole Figure 7-4 shows two RRUs installed on a pole. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 39 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-4 Two RRUs installed on a pole NOTE If two RRUs are installed on a pole, the minimum distance between the two sets of mounting kits is the height of an RRU. Figure 7-5, Figure 7-6, and Figure 7-7 show multiple RRUs installed on a pole. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 40 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-5 Three RRUs installed on a pole in centralized mode Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 41 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-6 Four RRUs installed on a pole in centralized mode Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 42 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-7 Six RRUs installed on a pole in centralized mode 7.2.1 Installing a Single RRU This section describes the procedure for installing a single RRU on a pole and the precautions that must be taken during the installation. Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower. The hoist clamp on the main mounting bracket is secured properly. Prerequisites Procedure Step 1 Determine a position for installing the main mounting bracket. l If the RRU must be installed on a tower, see 3.5.1 Clearance for a Single RRU to determine a position. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 43 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU l If the RRU must be installed on the ground, see Figure 7-8 to determine a position. Figure 7-8 Distance between the main mounting bracket and the ground Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally remove one end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and then disassemble the mounting kits, as shown in Figure 7-9. Figure 7-9 Removing the M10x150 bolt from the U notch Step 3 Install the bracket assembly on a pole. Then, place the removed end of the bolt into the U notch, as shown in Figure 7-10. Figure 7-10 Bracket assembly installed on a pole Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 44 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Step 4 To secure the bracket assembly to the pole, use a torque wrench with an aperture of 16 mm (0.67 in.) to tighten the two M10 nuts with a torque of 40 Nm (354.03 lbfin.), as shown in Figure 7-11. Figure 7-11 Securing the bracket assembly

(1) Plastic screw cap NOTE Do not remove the plastic screw caps from the bolts on the mounting kits. Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 7-12. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 45 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-12 Installing the RRU on the main mounting bracket

----End 7.2.2 Installing Two RRUs This section describes the procedure for installing two RRUs on a pole and the precautions that must be taken during the installation. Procedure Step 1 Install the first RRU, as shown in Figure 7-13. For details, see 7.2.1 Installing a Single RRU. Figure 7-13 Installing the first RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 46 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Step 2 Install the second set of mounting kits, The distance between the two sets of mounting kits must equal the height of an RRU. Step 3 Remove the attachment plate from the rear of the second RRU and then install it on the RRU front, as shown in Figure 7-14. Figure 7-14 Removing the attachment plate from the rear of the second RRU and then installing it on the RRU front 1. Remove the attachment plate from the RRU rear using an inner hexagon screwdriver. 2. Install the attachment plate to the RRU front, and tighten the stainless steel screws on the attachment plate with a torque of 4.8 Nm (44.25 lbfin.) using a torque screwdriver. Step 4 Install the second RRU on the main mounting bracket, as shown in . NOTE When you install two RRUs in back-to-back mode, ensure that the cabling cavities of these two RRUs face the same direction. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 47 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-15 Installing the second RRU on the main mounting bracket

(1) RRU installed in standard mode

(2) RRU installed in reverse mode

(3) Cabling cavity

----End 7.2.3 Installing Multiple RRUs This section describes the procedure for installing multiple remote radio units (RRUs) on a pole and the precautions that must be taken during the installation. Three, four, or six RRUs can be installed on a pole. The procedures for installing them are the same. Following is the procedure for installing four RRUs on a pole. Context Procedure Step 1 Install the first set of mounting kits on a pole. For details, see 7.2.1 Installing a Single RRU. Step 2 Remove an attachment plate from the RRU rear, and install it on one side of the RRU, as shown in Figure 7-16. (Repeat this step to change the positions of all the other attachment plates of the RRU.) Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 48 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-16 Removing an attachment plate from the RRU rear and installing it on one side of the RRU 1. Use an inner hexagon screwdriver to remove the attachment plate from the RRU rear. 2. Install the attachment plate on one side of the RRU, and use a torque screwdriver to tighten the stainless steel screws on the attachment plate with a torque of 5 Nm (44.25 lbfin.). Step 3 Install the first RRU on the main mounting bracket in the first set of mounting kits, as shown in Figure 7-17. Figure 7-17 Installing the first RRU on the main mounting bracket Step 4 Install the second main mounting bracket on the side of the first main mounting bracket, as shown in Figure 7-18. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 49 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-18 Installing the second main mounting bracket Step 5 Install the second RRU on the second main mounting bracket, as shown in Figure 7-19. Figure 7-19 Installing the second RRU on the main mounting bracket Step 6 Install the third main mounting bracket and the third RRU, as shown in Figure 7-20. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 50 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-20 Installing the third RRU on the main mounting bracket Step 7 Install the second set of mounting kits, as shown in Figure 7-21. The minimum distance between the two sets of mounting kits is the height of an RRU. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 51 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-21 Installing the second set of mounting kits Step 8 Install the fourth RRU on the main mounting bracket of the second set of mounting kits, as shown in Figure 7-22. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 52 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-22 Installing the fourth RRU on the main mounting bracket

----End 7.3 Installing the RRU on U-Steel This section describes the procedure for installing the RRU on U-steel and the precautions that must be taken during the installation. The RRU installed on U-steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on U-steel. Prerequisites Context Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower. The hoist clamp on the main mounting bracket is secured properly. Figure 7-23 shows the top view of the RRU installed on angle steel. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 53 DBS3900 RRU3252/RRU3256 Installation Guide Figure 7-23 Top view of the RRU 7 Installing the RRU

(1) U-steel NOTE If the length of the narrow side of U-steel is less than 40 mm (1.57 in.), install an RRU in mode a or mode b shown in Figure 7-23. Procedure Step 1 Determine a position for installing the main mounting bracket. l If the RRU is to be installed on a tower, determine the position for installing the main mounting bracket by referring to 3.5.1 Clearance for a Single RRU. l If the RRU is to be installed on the ground, determine the position for installing the main mounting bracket by referring to Figure 7-24. Figure 7-24 Distance between the main mounting bracket and the ground Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 54 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU NOTE It is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.) above the ground. Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally remove one end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and then disassemble the mounting kits, as shown in Figure 7-25. Figure 7-25 Removing the M10x150 bolt from the U notch Step 3 Install the bracket assembly on U-steel. Then, place the removed end of the bolt into the U notch, as shown in Figure 7-26. Figure 7-26 Bracket assembly installed on U-steel Step 4 To secure the bracket assembly to the U-steel, use a torque wrench with an aperture of 16 mm

(0.67 in.) to tighten the two M10 nuts with a torque of 40 Nm (354.03 lbfin.), as shown in Figure 7-27. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 55 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-27 Securing the bracket assembly

(1) Plastic screw cap Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 7-28. Figure 7-28 Installing the RRU on the main mounting bracket Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 56 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU

----End 7.4 Installing the RRU on Angle Steel This section describes the procedure for installing the RRU on angle steel and the precautions that must be taken during the installation. The RRU installed on angle steel can be mounted to a tower or placed on the ground. It is recommended that only one RRU be installed on angle steel. Prerequisites Context Before you install an RRU on a tower, the RRU and mounting kits are hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower. The hoist clamp on the main mounting bracket is secured properly. Figure 7-29 shows the top view of the RRU installed on angle steel. Figure 7-29 Top view of the RRU

(1) Angle steel Procedure Step 1 Determine a position for installing the main mounting bracket. l If the RRU is to be installed on a tower, determine the position for installing the main mounting bracket by referring to 3.5.1 Clearance for a Single RRU. l If the RRU is to be installed on the ground, determine the position for installing the main mounting bracket by referring to Figure 7-30. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 57 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-30 Distance between the main mounting bracket and the ground NOTE It is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.) above the ground. Step 2 Manually loosen the two M10 nuts on the mounting kits counterclockwise, horizontally remove one end of the M10x150 bolt from the U notch on the auxiliary mounting bracket, and then disassemble the mounting kits, as shown in Figure 7-31. Figure 7-31 Removing the M10x150 bolt from the U notch Step 3 Install the bracket assembly on angle steel. Then, place the removed end of the bolt into the U notch, as shown in Figure 7-32. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 58 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-32 Bracket assembly installed on angle steel Step 4 To secure the bracket assembly to the angle steel, use a torque wrench with an aperture of 16 mm (0.67 in.) to tighten the two M10 nuts with a torque of 40 Nm (354.03 lbfin.), as shown in Figure 7-33. Figure 7-33 Securing the bracket assembly

(1) Plastic screw cap Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 7-34. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 59 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-34 Installing the RRU on the main mounting bracket

----End 7.5 Installing the RRU on a Wall This section describes the procedure for installing the RRU on a wall and the precautions that must be taken during the installation. Prerequisites Context Procedure The hoist clamp on the main mounting bracket is secured properly. The wall on which RRUs are installed must meet the following requirements:

l When a single RRU is installed, the wall has a capacity of bearing at least four times the weight of the RRU. l Expansion bolts must be tightened with a torque of 15 Nm (265.52 lbfin.) to ensure the bolts work properly and the wall remains intact without cracks in it. Step 1 Remove the plastic screw caps, M10 nuts, spring washers, flat washers, auxiliary brackets, and M10x150 bolts in sequence. Then, use the main mounting bracket to secure the RRU to a wall. Step 2 Place the main mounting bracket against the installation position, use a level to verify that the main mounting bracket is placed horizontally, and then mark anchor points with a marker, as shown in Figure 7-35. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 60 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-35 Marking the anchor points

(1) Main mounting bracket

(2) RRU NOTE It is recommended that the main mounting bracket be 1200 mm to 1600 mm (47.24 in. to 62.99 in.) above the ground. Figure 7-36 Expansion bolt assembly

(1) M8x85 bolt

(2) Spring washer 8 (3) Plastic tube

(4) Flat washer 8

(5) Expansion tube Step 3 Drill holes at the anchor points, and then install expansion bolt assemblies, as shown in Figure 7-37. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 61 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-37 Drilling a hole and installing an expansion bolt assembly 1. Use a hammer drill with a 12 bit to drill holes vertically at the marked anchor points. Ensure that the depth of each hole ranges from 55 mm to 60 mm (2.17 in. to 2.36 in.). WARNING Take proper safety measures to protect your eyes and respiratory tract against the dust before drilling holes. 2. Vertically insert the M8x85 expansion bolts into the mounting holes and use a rubber mallet to knock them until they are buried in the holes. Partially tighten the expansion bolts clockwise. Loosen the expansion bolts counterclockwise and then remove the M8x85 expansion bolts, spring washers, plastic tubes, and flat washers in sequence. 3. 4. NOTE After completely removing an expansion bolt, store the plastic tube properly. Step 4 Use the two removed M8x85 expansion bolts to secure the main mounting brackets to the wall. Then, use a torque socket to tighten the nuts of the expansion bolts with a torque of 15 Nm

(265.52 lbfin.), as shown in Figure 7-38. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 62 DBS3900 RRU3252/RRU3256 Installation Guide 7 Installing the RRU Figure 7-38 Securing the main mounting bracket to a wall

(1) M8x85 expansion bolts

(2) Spring washers

(3) Flat washers Step 5 Install the RRU on the main mounting bracket until the RRU snaps shut, as shown in Figure 7-39. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 63 DBS3900 RRU3252/RRU3256 Installation Guide Figure 7-39 Installing the RRU 7 Installing the RRU

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 64 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8 Installing RRU Cables About This Chapter This chapter describes the procedure for installing RRU cables. 8.1 Cabling Requirements Cables must be routed according to the specified cabling requirements to prevent signal interference. 8.2 Cable Connections This section describes the cable connections for a single RRU and multiple RRUs. 8.3 Installation Process This section describes the process of installing RRU cables. 8.4 RRU Cable List This section describes RRU cable connections. 8.5 Installing an RRU PGND Cable This section describes the procedure for installing an RRU PGND cable. 8.6 Installing an RRU RF Jumper This section describes the procedure for installing an RRU RF jumper. 8.7 Installing an RRU Alarm Cable This section describes the procedure for installing an RRU alarm cable. 8.8 Installing an RRU AISG Multi-Wire Cable and an RRU AISG Extension Cable This section describes the procedures for installing an RRU AISG multi-wire cable and an RRU AISG extension cable. 8.9 Opening the Cover Plate of an RRU Cabling Cavity This section describes the procedure for opening the cover plate of an RRU cabling cavity. 8.10 Installing an RRU Power Cable This section describes the procedure for installing an RRU power cable. 8.11 Installing an Optical Fiber Cable This section describes the procedure for installing an optical fiber cable. 8.12 Closing the Cover Plate of an RRU Cabling Cavity Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 65 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables This section describes the procedure for closing the cover plate of an RRU cabling cavity. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 66 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8.1 Cabling Requirements Cables must be routed according to the specified cabling requirements to prevent signal interference. NOTE If a cable listed below is not required, skip the routing requirements of the cable. General Cabling Requirements Requirements for Bending Radius l The bending radius of the 7/8'' feeder must be more than 250 mm (9.84 in.), and the bending radius of the 5/4'' feeder must be more than 380 mm (14.96 in.). l The bending radius of the 1/4'' jumper, ordinary 1/2'' jumper, super-flexible 1/2'' jumper, and RG-8U jumper must be more than 35 mm (1.38 in.), 127 mm (5 in.), 50 mm (1.97 in.), and 50 mm (1.97 in.), respectively. l The bending radius of the power cable or PGND cable must be at least three times the diameter of the cable. l The bending radius of a fiber optic cable is at least 20 times the diameter of the fiber optic cable, and the minimum bending radius of the breakout cable at each end of the fiber optic cable is 30 mm (1.18 in.). l The bending radius of the E1/T1 cable must be at least three times the diameter of the cable. l The bending radius of the signal cable must be at least five times the diameter of the cable. Requirements for Cable Binding l The same types of cable must be bound together. l Different types of cable must be separately routed with the minimum spacing of 30 mm

(1.18 in.) and cannot be entangled. l The cables must be bound tightly and neatly. The sheaths of the cables must not be damaged. l Cable ties are installed in the same direction, and those at the same horizontal line must be in a straight line. l The excess of indoor cable ties is trimmed off, and the excess of outdoor cable ties allows about 5 mm (0.2 in.), without remaining rough edges. l Labels or nameplates must be attached to both ends, joints, or turns of cables after they are installed. Security Requirements l Cables should be placed away from sharp objects or wall burrs. If these positions are inevitable, protect the cables with protection pipes. l Cables must be routed away from heat sources, or heat-insulation materials are added between cables and heat sources. l Sufficient slack (recommended for about 0.1 m [0.33 ft.]) is provided in cables at turns or the position close to a device, facilitating cable and device maintenance. Indoor Cabling Requirements l Cables are routed indoors through the feeder window. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 67 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables l Drip loops must be made outside the feeder window, and the requirements for the minimum bending radius are met. l When cables are routed indoors, engineers are required indoors for cooperation. l The feeder window must be waterproofed. Outdoor Cabling Requirements l Cables routed outdoors must be led through a pipe when they may be damaged. l AC power cables, transmission cables, and cables buried in the ground must be protected. l If cables at the cabinet bottom need to be routed through a pipe along the ground, lead the pipe into the cabinet base for about 3 m (9.84 ft.) to 5 m (16.4 ft.), not into the cabinet. Block the pipe with waterproof tape or silicon gel, and secure the pipe to the cable hole at the cabinet bottom with metal piece. l If cables at the cabinet bottom need to be routed through a pipe along the metal cable trough, do not lead the pipe into the cabinet base. The cable trough must be sealed and routed through the cable hole at the cabinet bottom. l Cables are secured with cable clips. l Cables are routed neatly along the specified cabling direction and secured with cable clips. l The positions for cable clips are determined onsite. For example, the cable clips for the 7/8" feeder are installed at the spacing of 1.5 m (4.92 ft.) to 2 m (6.56 ft.) in the same direction, and the cable clips for the power cables are installed at the spacing of 1 m (3.28 ft.) to 1.5 m (4.92 ft.) in the same direction. l Cable clips must be vertical with cables, and the cables in a cable clip must be parallel. l After routing cables neatly and correctly, tighten the screws on cable clips. Secure cables on the cable tray, as shown in Figure 8-1. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 68 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-1 Securing cables on the cable tray Secure cables on the tower, as shown in Figure 8-2. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 69 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-2 Securing cables on the tower Special Cabling Requirements Cabling Requirements for Power Cables l Power cables must be installed in the position specified in engineering design documents. l If the length of power cables is insufficient, replace the cables rather than adding connectors or soldering joints to lengthen the cables. l Cables must be routed by only qualified and trained personnel before all preparations are made. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 70 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables l Cables are routed in an untangled and orderly fashion. l If DC power cables need to be routed on the tower platform, lay out the cables on the guardrail with the shortest distance and route the cables along the guardrail. l If DC power cables need to be routed close to a device on the tower, secure the cables to the guardrail or pole with cable clips. The device cannot be far away from the position for securing the cables. Cabling Requirements for PGND Cables l PGND cables for the base station must be connected to the same ground bar. l PGND cables must be buried in the ground or routed indoors. They should not be routed overhead before they are led into the equipment room. l The exterior of the coaxial wire and the shield layer of the shielded cable must have proper electrical contact with the metal surface of the equipment to which they are connected. l PGND cables and signal cables must be installed in an untangled and orderly fashion. A certain distance must be reserved between them to prevent interference from each other. l Fuses or switches must not be installed on the PGND cables. l Other devices must not be used for electrical connections of the PGND cables. l All the metal parts in the housing of the equipment must be reliably connected to the ground terminal. Cabling Requirements for E1 Cables l E1 cables must not cross power cables, PGND cables, or RF cables when routed. If transmission cables are routed with power cables, PGND cables, or RF cables in parallel, the spacing between them must be greater than 30 mm (1.18 in.). l E1 cables are routed straightly and bound neatly with cable ties. l Sufficient slack is provided in E1 cables at turns. Cabling Requirements for Fiber Optic Cables l Fiber optic cables must be routed by at least three qualified and trained personnel before all preparations are made. l Fiber optic cables are used within the temperature range of -40C to 60C. If the current temperature is out of the range, make protection measures or route the cables again. l Cables are routed in an untangled and orderly fashion. l Do not bind fiber optic cables at turns. l Do not stretch, step on, or place heavy objects on fiber optic cables. Keep the cables away from sharp objects. l When fiber optic cables are routed, the excess of the cables must be coiled around special devices, such as a fiber coiler. l When coiling fiber optic cables, apply even strength. Do not bend the cables with force. l Vacant optical connectors must be covered with dustproof caps. l Fiber optic cables cannot be squeezed by the cabinet door when routed through the cabinet. l If fiber optic cables need to be routed on the tower platform, lay out the cables on the guardrail with the shortest distance and route the cables along the guardrail. l If fiber optic cables need to be routed close to a device on the tower, secure the cables to the guardrail or pole with cable clips. The device cannot be far away from the position for securing the cables. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 71 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables l If the fiber optic cables close to a device are too long, coil the excess of the cables and secure them on the tower. 8.2 Cable Connections This section describes the cable connections for a single RRU and multiple RRUs. NOTE A lower-level RRU obtains power directly from the external power system, but not from an upper-level RRU using a power cable. For the cable connection between an RRU and an RGPS antenna (optional), refer to the document delivered with the RGPS antenna. For the cable connection between an RRU and an AUF (optional), refer to the document delivered with the AUF. Figure 8-3 shows the cable connections adopted for a single RRU when the alarm monitoring function is provided. Figure 8-3 Cable connections for a single RRU (1)

(1) PGND cable

(2) RRU RF jumper

(4) CPRI optical fiber cable

(5) RRU power cable

(3) RRU alarm cable

(6) RGPS signal cable Figure 8-4 shows the cable connections adopted for a single RRU when the remote electrical tilt (RET) function is provided. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 72 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-4 Cable connections for a single RRU (2)

(1) PGND cable

(2) RRU RF jumper

(3) RRU AISG multi-wire cable

(4) RRU AISG extension cable

(5) CPRI optical fiber cable

(6) RRU power cable

(7) RGPS signal cable Figure 8-5 shows the cable connections adopted for multiple RRUs when the alarm monitoring function is provided. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 73 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-5 Cable connections for multiple RRUs (1)

(1) PGND cable

(4) CPRI optical fiber cable or SFP high-speed cable for cascading RRUs

(2) RRU RF jumper

(3) RRU alarm cable

(5) RRU power cable (6) RGPS signal cable NOTE If you must cascade two or more RRUs in the same cell, for example, to expand the capacity, install the alarm cable to the RRU at the last level. Figure 8-6 shows the cable connections adopted for multiple RRUs when the remote electrical tilt (RET) function is provided. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 74 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-6 Cable connections for multiple RRUs (2)

(1) PGND cable

(2) RRU RF jumper

(3) RRU AISG multi-wire cable

(4) RRU AISG extension cable (5) CPRI optical fiber cable or SFP high-

speed cable for cascading RRUs

(6) RRU power cable

(7) RGPS signal cable 8.3 Installation Process This section describes the process of installing RRU cables. Figure 8-7 shows the process of installing RRU cables. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 75 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-7 Process of installing RRU cables 8.4 RRU Cable List This section describes RRU cable connections. Table 8-1 lists RRU cables. Table 8-1 RRU cables Cable One End Connector RRU PGND Cable OT terminal

(M6) RRU Power Cable Tool-less female connector

(pressfit type) Connected to... Ground terminal on the RRU NEG(-) and RTN(+) ports on the RRU The Other End Connector Connected to... OT terminal

(M8) Ground terminal on the ground bar Tool-less female connector

(pressfit type) One of RRU0 to RRU5 ports on the EPS Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 76 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Cable One End Connector Connected to... The Other End Connector OT terminal

(M4) CPRI Fiber Optic Cable DLC connector CPRI0/IR0 port on the RRU DLC connector Type N connector Round 12-pin connector RGPS antenna RRU RF Jumper Type N connector RGPS Jumper

(optional) Waterproofed DB15 connector CPRI1/IR1 port on the RRU ANT0 to ANT3 ports on the RRU Remote Global Positioning System (RGPS) port at the RRU bottom SFP High-

Speed Cable for Cascaded RRUs

(optional) RRU Alarm Cable (optional) Waterproofed DB9 male connector RET/

EXT_ALM port on the RRU RET/

EXT_ALM port on the RRU RRU AISG Multi-Wire Cable (optional) Waterproofed DB9 male connector Standard AISG female connector SFP20 male connector CPRI1 port on the RRU SFP20 male connector CPRI0 port on the RRU Cord end terminal External alarm device Connected to... One of LOAD0 to LOAD5 ports on the DCDU One of LOAD4 to LOAD9 ports on the PDU CPRI port on the LBBP in the BBU CPRI0/IR0 port on the RRU Antenna system Standard AISG male connector on the remote control unit

(RCU) or on the AISG extension cable Standard AISG male connector on the RCU RRU AISG Extension Cable (optional) Standard AISG male connector Standard AISG female connector Standard AISG female connector on the AISG multi-

wire cable Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 77 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8.5 Installing an RRU PGND Cable This section describes the procedure for installing an RRU PGND cable. Context Procedure The minimum cross-sectional area of an RRU PGND cable is 16 mm2 (0.025 in.2). The cable has an M6 OT terminal at one end and an M8 terminal at the other end. Step 1 Prepare an RRU PGND cable. 1. Cut the cable to the required length based on the actual cable route. 2. Add an OT terminal to each end of the cable by referring to Assembling the OT Terminal and the Power Cable. Step 2 Install the RRU PGND cable. Connect the M6 OT terminal at one end of the PGND cable to the ground terminal at the RRU bottom and the M8 OT terminal at the other end to the external ground bar, as shown in Figure 8-8. Figure 8-8 Installing an RRU PGND cable NOTE Crimp OT terminals in correct directions, as shown in Figure 8-9. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 78 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-9 Correct direction of an OT terminal Step 3 Label the installed cable by referring to Attaching a Cable-Tying Label.

----End 8.6 Installing an RRU RF Jumper This section describes the procedure for installing an RRU RF jumper. Context The RF ports on the RRU must be connected using RF jumpers to the mapping ANT0 to ANT3 ports on the antenna. Figure 8-10shows the mapping relationship between the RF ports and the antenna ports. Figure 8-10 The mapping relationship between the RF ports and the antenna ports NOTE The port labels in this figure are examples and for reference only. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 79 DBS3900 RRU3252/RRU3256 Installation Guide Procedure 8 Installing RRU Cables Step 1 Connect the Type N connector at one end of the RRU RF jumper to the ANT port and use a torque wrench to tighten the connector with a torque of 1 Nm (12.39 lbfin.), as shown in Figure 8-11. Figure 8-11 Installing an RRU RF jumper CAUTION On AC-powered electric railways, such as high speed railways, when leaky cables are connected to RRUs installed in tunnels, high-voltage-resistant DC blocks must be installed between RRU RF jumpers and the leaky cables to protect the RRUs against damage. Step 2 Connect the other end of the RF jumper to the external antenna system. Step 3 Waterproof the connectors of the RF jumper by referring to Figure 8-12. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 80 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-12 Waterproofing a connector of the RF jumper

(1) PVC insulation tape

(2) Waterproof tape NOTE l Before wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice its original length. l Before wrapping the PVC insulation tape, do not stretch the PVC insulation tape. l Ensure that each layer of tape overlaps more than 50% of the preceding layer. Stretch and press the tape tightly to avoid wrinkles or spaces. Ensure that the tape is tightly wrapped and stuck and will not fall off. l Ensure that the adhesive surface of the tape overlaps the lower layer. l Cable ties, cutting at the position of 3mm ~5mm far from head. 1. Wrap each connector with one layer of insulation tape from bottom up. 2. Wrap each connector with three layers of waterproof tape, first from bottom up, then from top down, and finally from bottom up. Do not cut the tape until all the three layers of the tape are already wrapped. Wrap each layer of tape around the connector tightly. 3. Wrap each connector with three layers of PVC insulation tape, first from bottom up, then from top down, and finally from bottom up. Do not cut the tape until all the three layers of the tape are already wrapped. Wrap each layer of tape around the connector tightly. Step 4 Retain the dustproof caps on vacant antenna connectors and waterproof the dustproof caps, as shown in Figure 8-13. CAUTION Do not remove dustproof caps from vacant antenna connectors. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 81 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-13 Waterproofing a dustproof cap

(1) Dustproof cap

(2) PVC insulation tape

(3) Waterproof tape NOTE l Before wrapping the waterproof tape, stretch the tape evenly until the length of the tape is twice its original length. l Before wrapping the PVC insulation tape, do not stretch the PVC insulation tape. l Ensure that each layer of tape overlaps more than 50% of the preceding layer. Stretch and press the tape tightly to avoid wrinkles or spaces. Ensure that the tape is tightly wrapped and stuck and will not fall off. l Ensure that the adhesive surface of the tape overlaps the lower layer. l Cable ties, cutting at the position of 3mm~5mm far from head. 1. Verify that dustproof caps are not removed. 2. Wrap each dustproof cap with one layer of PVC insulation tape from bottom up. 3. Wrap each dustproof cap with three layers of waterproof tape, first from bottom up, then from top down, and finally from bottom up. Do not cut the tape until all the three layers of the tape are already wrapped. Wrap each layer of tape around the cap tightly. 4. Wrap each dustproof cap with three layers of PVC insulation tape, first from bottom up, then from top down, and finally from bottom up. Do not cut the tape until all the three layers of the tape are already wrapped. Wrap each layer of tape around the connector tightly. Step 5 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Step 6 Label the installed cable by referring to Attaching a Sign Plate Label. Step 7 Attach colored insulation tapes to the jumper by referring to Attaching the Color Ring.

----End 8.7 Installing an RRU Alarm Cable This section describes the procedure for installing an RRU alarm cable. Procedure Step 1 Connect the DB9 connector at one end of the RRU alarm cable to the RET/EXT_ALM port on the RRU, and connect the eight cord end terminals at the other end to the external alarm device, as shown in Figure 8-14. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 82 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-14 Installing an RRU alarm cable Step 2 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Step 3 Label the installed cable by referring to Attaching an L-Shaped Label.

----End 8.8 Installing an RRU AISG Multi-Wire Cable and an RRU AISG Extension Cable This section describes the procedures for installing an RRU AISG multi-wire cable and an RRU AISG extension cable. Context Procedure When the distance between an RRU and a Remote Control Unit (RCU) is longer than 5 m (16.4 ft.), an AISG multi-wire cable is not long enough to connect the RRU and the RCU. In this case, an AISG extension cable is used to extend the AISG multi-wire cable. l Install an AISG multi-wire cable that is not configured with an AISG extension cable. 1. Connect the waterproofed DB9 connector at one end of the AISG multi-wire cable to the RET/EXT_ALM port on the bottom of the RRU, as shown in Figure 8-15. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 83 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-15 Installing an RRU AISG multi-wire cable 2. Connect the other end of the cable to the standard AISG male connector on the RCU. 3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Label the installed cable by referring to Attaching an L-Shaped Label. 4. l Install an AISG multi-wire cable that is configured with an AISG extension cable. 1. Connect the waterproofed DB9 connector at one end of the AISG multi-wire cable to the RET/EXT_ALM port on the bottom of the RRU, and the other end of the cable to the standard AISG male connector of the AISG extension cable, as shown in Figure 8-16. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 84 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Figure 8-16 Installing an RRU AISG multi-wire cable 2. Connect the other end of the AISG extension cable to the standard AISG male connector on the RCU, as shown in Figure 8-17. Figure 8-17 Installing an RRU AISG multi-wire cable 3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 85 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Label the installed cable by referring to Attaching an L-Shaped Label. 4.

----End 8.9 Opening the Cover Plate of an RRU Cabling Cavity This section describes the procedure for opening the cover plate of an RRU cabling cavity. Procedure Step 1 Wear ESD gloves. CAUTION Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic damage to the boards, modules, or electronic components. Step 2 Use an M4 Phillips screwdriver to loosen the protection screw on the cover plate of the RRU cabling cavity, and pull the handle outwards to open the cover plate, as shown in Figure 8-18. Figure 8-18 Opening the cover plate of the RRU cabling cavity

(1) Protection screw Figure 8-19 shows the RRU cabling cavity. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 86 DBS3900 RRU3252/RRU3256 Installation Guide Figure 8-19 RRU cabling cavity 8 Installing RRU Cables

(1) Cover plate

(2) Cable diagram on label (3) Cable trough for the optical fiber cable

(4) Cable trough for the power cable (5) Waterproof block

(6) Clip

(7) Cabling cavity

-

-

Step 3 Loosen the screws on the clips, and open the clips, as shown Figure 8-20. NOTE Open the clips only for the cables to be installed. Figure 8-20 Opening clips

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 87 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables 8.10 Installing an RRU Power Cable This section describes the procedure for installing an RRU power cable. Prerequisites Context Procedure A tool-less female connector (pressfit type) is added to the RRU power cable on the RRU side. For details, see 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable. CAUTION When installing the RRU power cable, connect the RRU power cable first to the RRU and then to the power device. Operations in the reverse sequence may cause damage to the components and injury of human bodies. l Install an RRU power cable that feeds power to an RRU from a DCDU when the DCDU is configured. 1. Connect the tool-less female connector (pressfit type) at one end of the RRU power cable to the power supply socket on the RRU, as shown in Figure 8-21. Figure 8-21 Installing an RRU power cable Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 88 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables CAUTION Ensure that the exposed shield layer of the power cable is properly tightened using the clip. 2. Connect the other end of the RRU power cable to the output terminal on the DCDU. 3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Label the installed cable by referring to Attaching a Cable-Tying Label. 4. l Install an RRU power cable that feeds power to an RRU from the embedded power system

(EPS) when the EPS is configured. 1. Connect the tool-less female connector (pressfit type) at one end of the RRU power cable to the power supply socket on the RRU, as shown in Figure 8-21. 2. Connect the tool-less female connector (pressfit type) at one end of the RRU power cable to the RRU0 port on the EPS subrack. NOTE l The blue core wire in the tool-less female connector (pressfit type) is connected to the left port on the EPS subrack, and the black/brown core wire is connected to the right port on the EPS subrack. l The EPS can supply power to a maximum of six RRUs. The RRU power cable can be connected to any of RRU0 to RRU5 ports on the EPS subrack. 3. Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Label the installed cable by referring to Attaching a Cable-Tying Label. 4.

----End 8.11 Installing an Optical Fiber Cable This section describes the procedure for installing an optical fiber cable. Prerequisites Before the installation, distinguish single-mode optical modules from multi-mode optical modules by either of the following means:

l SM and MM labels on an optical module: SM indicates a single-mode optical module, and MM indicates a multi-mode optical module. l Color of the puller on an optical module: Blue indicates a single-mode optical module, and black or gray indicates a multi-mode optical module. CAUTION The optical modules to be installed must match the rates of their corresponding CPRI ports. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 89 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Context Procedure A CPRI optical fiber cable transmits CPRI signals between a BBU and an RRU. Step 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on the RRU and the other optical module into the CPRI port on the BBU, and raise the pullers, as shown in Figure 8-22. Figure 8-22 Installing an optical module CAUTION The performance of an optical module that is exposed to the air for more than 20 minutes may be abnormal. Therefore, you must insert an fiber optic cable into an unpacked optical module within 20 minutes. Step 2 Connect the end labeled 1A and 1B of the optical fiber cable to the optical module on the RRU side, as shown in Figure 8-23. Figure 8-23 Installing an CPRI optical fiber cable Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 90 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables CAUTION To avoid any damage to optical fiber cables, secure the optical fiber cable in the cable clip near the power cable to leave some slack at the bend. Tighten the screws on the cable clip with a torque of 1.4 Nm (12.39 lbfin.). Step 3 Connect the end labeled 2A and 2B of the optical fiber cable to the optical module on the BBU side. Step 4 Route the cable by referring to Cabling Requirements. Then, use cable ties to bind the cable. Step 5 Label the optical fiber cable by referring to Attaching an L-Shaped Label.

----End 8.12 Closing the Cover Plate of an RRU Cabling Cavity This section describes the procedure for closing the cover plate of an RRU cabling cavity. Procedure Step 1 Close clips and use a torque screwdriver to tighten the screws on each clip with a torque of 1.4 Nm (12.39 lbfin.), as shown in Figure 8-24. Figure 8-24 Closing clips Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 91 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables CAUTION Ensure that the exposed shield layer of the power cable is properly tightened using the clip. Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure 8-25. Figure 8-25 Correct placement of waterproof blocks Step 3 Close the cover plate of the RRU cabling cavity, and use a torque screwdriver to tighten the screws on the cover plate with a torque of 1.4 Nm (12.39 lbfin.), as shown in Figure 8-26. Figure 8-26 Closing the cover plate of the RRU cabling cavity

(1) Protection screw CAUTION Before tightening the screws on the cover plate, ensure that cables and waterproof blocks are properly inserted into troughs. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 92 DBS3900 RRU3252/RRU3256 Installation Guide 8 Installing RRU Cables Step 4 Take off the ESD gloves, and pack up all the tools.

----End Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 93 DBS3900 RRU3252/RRU3256 Installation Guide 9 Checking the RRU Hardware Installation 9 Checking the RRU Hardware Installation This section describes how to check RRU hardware installation after the installation is complete. Table 9-1 provides the checklist for the RRU hardware installation. Table 9-1 Checklist for the RRU hardware installation SN 1 Item The position for each device conforms to the engineering drawing and meets the space requirement. Sufficient space is reserved for equipment maintenance. 2 3 4 5 6 7 8 9 10 11 The RRU is securely installed. The cover plate is securely installed on the RRU cabling cavity. Waterproof blocks are securely installed in vacant cable troughs of the RRU cabling cavity, and the cover plate for the cabling cavity is securely installed. In addition, vacant RF ports are covered with dustproof caps and the caps are waterproofed. There are no connectors or joints on each power cable or PGND cable. The terminals at two ends of each power cable or PGND cable are securely soldered or crimped. None of power cables and PGND cables can be short-circuited or reversely connected. In addition, these cables are not damaged or broken. Power cables and PGND cables are separately bound from other cables. The protection grounding of the RRU and the surge protection grounding of the building share one group of ground conductors. The connectors of each signal cable are intact and securely linked, and these cables are not damaged or broken. Labels are correct, legible, and complete at both ends of each cable, feeder, and jumper. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 94 DBS3900 RRU3252/RRU3256 Installation Guide 10 Powering On an RRU 10 Powering On an RRU This section describes how to check the power-on status of an RRU after all the devices are installed. Figure 10-1 shows the RRU power-on check process. Figure 10-1 Powering on an RRU Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 95 DBS3900 RRU3252/RRU3256 Installation Guide 10 Powering On an RRU NOTE l The RRU is provided with -48 V DC power and the external voltage ranges from -32 V DC to -60 V DC. l When the RRU is working properly, the RUN indicator blinks one second on and one second off, and the ALM indicator is steady off. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 96 DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix 11 Appendix About This Chapter This section describes the procedure for adding an easy power receptacle (pressfit type) connector. 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable This section describes the procedure for adding an easy power receptacle (pressfit type) connector to an RRU power cable. Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 97 DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix 11.1 Adding an Easy Power Receptacle (Pressfit Type) Connector to an RRU Power Cable This section describes the procedure for adding an easy power receptacle (pressfit type) connector to an RRU power cable. Procedure Step 1 Open the cabling cavity and take out the easy power receptacle (pressfit type) connector. Then, mark the lengths of the power cable for different operations based on the label on the cover of the cabling cavity, as shown in Figure 11-1. Figure 11-1 Marking the lengths of the RRU power cable for different operations Step 2 Use a cable cutter and wire stripper to strip off the specified length of the sheath from the power cable, as shown in Figure 11-2. Figure 11-2 Stripping off the specified length of sheath from the power cable Step 3 Strip off the sheath from each core wire, as shown in Figure 11-3. Figure 11-3 Stripping off the sheath from each core wire Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 98 DBS3900 RRU3252/RRU3256 Installation Guide NOTE 11 Appendix Ensure that the length of the sheath stripped off from each core wire must match the length of the notch in the easy power receptacle (pressfit type) connector, as shown in Figure 11-4. Figure 11-4 Stripping off the sheath from each core wire Step 4 Strip off the sheath from the power cable to expose its shield layer, as shown in Figure 11-5. Figure 11-5 Stripping off the sheath from the power cable to expose its shield layer Step 5 Use a Phillips screwdriver to loosen the screws, as shown in Figure 11-6. Figure 11-6 Loosening screws Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 99 DBS3900 RRU3252/RRU3256 Installation Guide 11 Appendix Step 6 Connect the blue core wire labeled NEG(-) to the - port and connect the black core wire labeled RTN(+) to the + port on the easy power receptacle (pressfit type) connector. Then, tighten the screws, as shown in Figure 11-7. Figure 11-7 Adding an easy power receptacle (pressfit type) connector to a power cable Ensure that only a 1.5 mm (0.06 in.) core wire is exposed out of the connector and that the exposed part cannot be folded, as shown in Figure 11-8. Figure 11-8 Easy power receptacle (pressfit type) connectors installed in different ways CAUTION If the wire connections are incorrect, the equipment cannot be powered on. Correctly connect the wires 10 seconds later. Step 7 Confirm that the core wires are securely connected to the connector, as shown in Figure 11-9. Figure 11-9 Correct installation of an easy power receptacle (pressfit type) connector Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 100 DBS3900 RRU3252/RRU3256 Installation Guide

----End 11 Appendix Issue Draft A (2012-11-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 101