FCC ID: QISPRRU3916 pico Remote Radio Unit

DBS3900 LampSite Site Maintenance Guide Issue Date 07 2016-05-30 HUAWEI TECHNOLOGIES CO., LTD. Copyright Huawei Technologies Co., Ltd. 2016. 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 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. i DBS3900 LampSite Site Maintenance Guide About This Document About This Document Overview This document describes routine maintenance items for a BBU, DCU3900, RHUB3908, pRRU3901, pRRU3902, pRRU3907 and pRRU3911, such as equipment maintenance, and power-on and power-off operations. It also explains how to replace the components and modules. NOTE l Unless otherwise specified, BBU in this document refers to BBU3900 and BBU3910. For details of the BBU site maintenance guide, see DBS3900 Site Maintenance Guide. l DCU3900 referred to as DCU in this document. For details about the hardware maintenance guide of the DCU, see DCU3900 Hardware Maintenance Guide. l RHUB3908 referred to as RHUB in this document. l Unless otherwise specified, pRRU in this document refers to pRRU3901, pRRU3902, pRRU3907 and pRRU3911. Product Version The following table lists the product version related to this document. Product Name Solution Version Product Version DBS3900 LampSite V100R010C10 and later versions l SRAN10.1 and later versions l RAN17.1 and later versions l eRAN8.1 and later versions l eRAN TDD 8.1 and later versions Intended Audience This document is intended for:

l System engineers Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. ii DBS3900 LampSite Site Maintenance Guide l Site maintenance engineers Organization About This Document 1 Changes in DBS3900 LampSite Site Maintenance Guide This chapter provides information about the changes in different document versions of DBS3900 LampSite Site Maintenance Guide. 2 Device Maintenance Items This chapter describes the device maintenance items. 3 Powering On and Powering Off the RHUB After the RHUB is powered on, check the indicator status. Power off the RHUB in normal or emergency mode as required. 4 Powering On and Powering Off the pRRU3901 After the pRRU3901 is powered on, check the power supply voltage and indicator status. Power off the pRRU3901 based on the power supply mode. 5 Replacing the Devices This chapter describes the procedures and cautions when replacing the devices. Conventions Symbol Conventions The symbols that may be found in this document are defined as follows. Symbol Description Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results. NOTICE is used to address practices not related to personal injury. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iii DBS3900 LampSite Site Maintenance Guide About This Document Symbol Description Calls attention to important information, best practices and tips. NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration. General Conventions The general conventions that may be found in this document are defined as follows. Convention Description Times New Roman 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. 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 Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. iv DBS3900 LampSite Site Maintenance Guide About This Document 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. 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 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. v DBS3900 LampSite Site Maintenance Guide Contents Contents About This Document.....................................................................................................................ii 1 Changes in DBS3900 LampSite Site Maintenance Guide..................................................... 1 2 Device Maintenance Items.......................................................................................................... 4 2.1 RHUB Maintenance Items..............................................................................................................................................5 2.2 pRRU Maintenance Items.............................................................................................................................................. 8 3 Powering On and Powering Off the RHUB........................................................................... 10 3.1 Powering On the RHUB............................................................................................................................................... 11 3.2 Powering Off the RHUB.............................................................................................................................................. 12 4 Powering On and Powering Off the pRRU3901....................................................................13 4.1 Powering On the pRRU................................................................................................................................................14 4.2 Powering Off the pRRU............................................................................................................................................... 16 5 Replacing the Devices................................................................................................................ 17 5.1 Replacing the RHUB.................................................................................................................................................... 18 5.2 Replacing an Optical Module....................................................................................................................................... 21 5.3 Replacing the pRRU.....................................................................................................................................................23 Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. vi DBS3900 LampSite Site Maintenance Guide 1 Changes in DBS3900 LampSite Site Maintenance Guide 1 Changes in DBS3900 LampSite Site Maintenance Guide This chapter provides information about the changes in different document versions of DBS3900 LampSite Site Maintenance Guide. 07 (2016-05-30) This is the seventh commercial release. Compared with 05 (2015-10-30), no information is added. Compared with 05 (2015-10-30), this issue incorporates the following changes:

Content 2.2 pRRU Maintenance Items 5.3 Replacing the pRRU Change Description Added the informations of pRRU3902, pRRU3907, pRRU3911. Compared with 05 (2015-10-30), this issue deletes the following new topics:

l pRRU3902 Maintenance Items l pRRU3907 Maintenance Items l pRRU3911 Maintenance Items l Replacing the pRRU3902 l Replacing the pRRU3907 l Replacing the pRRU3911 06 (2015-12-30) This is the sixth commercial release. Compared with 05 (2015-10-30), this issue includes the following new topics:

l pRRU3911 Maintenance Items l Replacing the pRRU3911 Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1 DBS3900 LampSite Site Maintenance Guide 1 Changes in DBS3900 LampSite Site Maintenance Guide Compared with 05 (2015-10-30), no information is changed. Compared with 05 (2015-10-30), no information is deleted. 05 (2015-10-30) This is the fifth commercial release. Compared with 04 (2015-07-30), this issue includes the following new topics:

l pRRU3907 Maintenance Items l Replacing the pRRU3907 Compared with 04 (2015-07-30), no information is changed. Compared with 04 (2015-07-30), no information is deleted. 04 (2015-07-30) This is the fourth commercial release. Compared with 03 (2015-06-30), no information is added. Compared with 03 (2015-06-30), this issue incorporates the following change:

Content Change Description Entire document Added the RHUB that has no electrical transmission port. Compared with 03 (2015-06-30), no information is deleted. 03 (2015-06-30) This is the third commercial release. Compared with 02 (2015-05-08), no information is added. Compared with 02 (2015-05-08), this issue incorporates the following change:

Content Change Description Entire document Added the descriptions about the DCU. Compared with 02 (2015-05-08), no information is deleted. 02 (2015-05-08) This is the second commercial release. Compared with 01 (2015-03-23), no information is added. Compared with 01 (2015-03-23), this issue incorporates the following change:

Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 2 DBS3900 LampSite Site Maintenance Guide 1 Changes in DBS3900 LampSite Site Maintenance Guide Content 2.2 pRRU Maintenance Items Change Description Deleted the descriptions about voltage measuring of the pRRU. Compared with 01 (2015-03-23), no information is deleted. 01 (2015-03-23) This is the first commercial release. Compared with draft A (2015-01-15), no information is added. Compared with draft A (2015-01-15), this issue incorporates the following change:

Content Change Description Entire document Added the descriptions about the pRRU3902. Compared with draft A (2015-01-15), no information is deleted. Draft A (2015-01-15) This is a draft release. Compared with Issue 05 (2014-12-30) of V100R009C00, no information is added. Compared with Issue 05 (2014-12-30) of V100R009C00, this issue incorporates the following change:

Content Change Description Entire document The base station in the LampSite solution is renamed DBS3900 LampSite. Compared with Issue 05 (2014-12-30) of V100R009C00, no information is deleted. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 3 DBS3900 LampSite Site Maintenance Guide 2 Device Maintenance Items 2 Device Maintenance Items About This Chapter This chapter describes the device maintenance items. 2.1 RHUB Maintenance Items This chapter describes the RHUB maintenance items, involving the equipment room, equipment, power system, and grounding system. 2.2 pRRU Maintenance Items This chapter describes the pRRU maintenance items, involving equipment and power system. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 4 DBS3900 LampSite Site Maintenance Guide 2 Device Maintenance Items 2.1 RHUB Maintenance Items This chapter describes the RHUB maintenance items, involving the equipment room, equipment, power system, and grounding system. Equipment Room Maintenance Items Table 2-1 lists the equipment room maintenance items. Table 2-1 Equipment room maintenance items Item Check Frequency Operation Environment alarms in the equipment room Daily Temperature in the equipment room Humidity in the equipment room Each time maintenance is performed Each time maintenance is performed Lighting system in the equipment room Every other month Air conditioner Every other month Check whether any power alarm, fire alarm, or smoke alarm is reported. Record temperatures in the equipment room measured by a thermometer. Record humidity in the equipment room measured by a hygrometer. Check whether the routine lighting system and emergency lighting system are running properly. Check whether the air conditioner is running properly. Reference Standard No power alarm, fire alarm, or smoke alarm is reported.

-5C to +50C 5%RH to 95%RH

-

-

Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 5 DBS3900 LampSite Site Maintenance Guide 2 Device Maintenance Items Item Check Frequency Operation Disaster protection devices Every one month Cleanness Every one month Equipment Maintenance Items Check whether the disaster protection, equipment protection, and firefighting devices are normal. Check whether the cabinet, equipment housing, equipment interior, desktop, floor, door, and window are clean and tidy. Reference Standard l The equipment room is equipped with portable foam-type extinguishers, and the pressure and expiration date must be checked. l The equipment room has no mice, ants, flying insects, or other risks. All these items are clean and tidy. Table 2-2 lists the equipment maintenance items. Table 2-2 Equipment maintenance items Item Check Frequency Operation Fan in the PSU Monthly or quarterly Check whether the fan is working properly. Equipment surface Monthly or quarterly Check whether the equipment surface is intact. Reference Standard The fan works properly without any abnormal smell or sound. The equipment surface is intact and the label of the cabinet is legible. Equipment cleanness Monthly or quarterly Check whether the equipment is clean. The equipment surface is clean. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 6 DBS3900 LampSite Site Maintenance Guide 2 Device Maintenance Items Item Check Frequency Operation Indicators Monthly or quarterly Check whether the indicators on the equipment are working properly. Electrostatic discharge (ESD) wrist strap Quarterly Check the ESD wrist strap in either of the following ways:

l Use an ESD wrist strap tester to check the ESD wrist strap. l Use a multimeter to test the ground resistance of the ESD wrist strap. Reference Standard For details about the indicator status, see RHUB Ports and Indicators in DBS3900 LampSite Hardware Description. If you use an ESD wrist strap tester, the GOOD indicator is on. If you use a multimeter, the ground resistance of the ESD wrist strap ranges from 0.75 ohms to 10 ohms. Maintenance Items for the Power System and Grounding System Table 2-3 lists the maintenance items for the power system and grounding system. Table 2-3 Maintenance items for the power system and grounding system Item Check Frequency Operation Reference Standard Power cables Monthly or quarterly Check the power cable connections. Voltage PGND cables Monthly or quarterly Use a multimeter to measure the voltage of the power supply. Monthly or quarterly Checks whether the PGND cables and ground bar are securely connected. The power cables are securely connected and not deteriorating. The joints are not corroded. The voltage is in the permissible range. The joints are secure and not corroded. The PGND cables and ground bar are not deteriorated and are protected from corrosion. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 7 DBS3900 LampSite Site Maintenance Guide 2 Device Maintenance Items Item Check Frequency Operation Ground resistance Monthly or quarterly Use a ground resistance tester to measure the ground resistance and record the measurement result. Reference Standard The ground resistance is equal to or less than 10 ohms. 2.2 pRRU Maintenance Items This chapter describes the pRRU maintenance items, involving equipment and power system. Equipment Maintenance Items Table 2-4 lists the equipment maintenance items for the pRRU. Table 2-4 Equipment maintenance items Item Check Frequency Operation Equipment surface Monthly or quarterly Check whether the equipment surface is intact. Reference Standard The equipment surface is intact and the label of the cabinet is legible. Equipment cleanness Indicators Monthly or quarterly Check whether the equipment is clean. The equipment surface is clean. Monthly or quarterly Check whether the indicators on the equipment are working properly. For details about the indicator status, see the chapter of Ports and Indicators in DBS3900 LampSite Hardware Description. NOTE For details about the ports and indicators of different pRRU models, see:

l pRRU: pRRU3901 Ports and Indicators l pRRU (TDD): pRRU3901 Ports and Indicators l pRRU3902: pRRU3902 Ports and Indicators l pRRU3907: pRRU3907 Ports and Indicators l pRRU3911: pRRU3911 Ports and Indicators l pRRU3911: pRRU3916 Ports and Indicators Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 8 DBS3900 LampSite Site Maintenance Guide Power System Maintenance Items Table 2-5 lists the power system maintenance items for the pRRU. Table 2-5 Power system maintenance items Item Check Frequency Operation Power cables Monthly or quarterly Check the power cable connections. 2 Device Maintenance Items Reference Standard The power cables are securely connected and not deteriorating. The joints are not corroded. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 9 DBS3900 LampSite Site Maintenance Guide 3 Powering On and Powering Off the RHUB 3 Powering On and Powering Off the RHUB About This Chapter After the RHUB is powered on, check the indicator status. Power off the RHUB in normal or emergency mode as required. 3.1 Powering On the RHUB The RHUB is powered by AC input. 3.2 Powering Off the RHUB An RHUB can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 10 DBS3900 LampSite Site Maintenance Guide 3 Powering On and Powering Off the RHUB 3.1 Powering On the RHUB The RHUB is powered by AC input. Prerequisites Context Procedure The power cable of the RHUB is not connected to power, that is, the power plug is removed. NOTICE The RHUB must be powered on within 7 days after it is unpacked, and the period of its power-off state cannot exceed 7 days during maintenance. Step 1 Insert the power plug to power on the RHUB. Step 2 Wait 3 to 5 minutes. Then check the status of the RUN indicator. If the RUN Indicator Is... It Indicates that... Then... Steady on Steady off There is power input, but the board is faulty. There is no power input, or an alarm about the board is reported. Disable the power supply, rectify the board fault, and then power on the RHUB again. Disable the power supply and check the power input again. If the power input is normal, rectify the board fault, and then power on the RHUB again. 1s on and 1s off The RHUB is running properly. End the power-on check task. 0.125s on and 0.125s off The board software is being loaded. If the loading is not complete after 5 minutes, disable the power supply and check whether the data in the configuration file is correct. Rectify the fault and then power on the RHUB again.

----End Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 11 DBS3900 LampSite Site Maintenance Guide 3 Powering On and Powering Off the RHUB 3.2 Powering Off the RHUB An RHUB can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios. Procedure l Normal power-off NOTICE Powering off the RHUB interrupts services, and therefore perform associated operations before a power-off. a. Remove the power plug to disconnect the RHUB with the external power input. b. If the RHUB is equipped with an external power device, turn off the switch of the external power device. l Emergency power-off Turn off the switch of the external power device. a.

----End Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 12 DBS3900 LampSite Site Maintenance Guide 4 Powering On and Powering Off the pRRU3901 4 Powering On and Powering Off the pRRU3901 About This Chapter After the pRRU3901 is powered on, check the power supply voltage and indicator status. Power off the pRRU3901 based on the power supply mode. 4.1 Powering On the pRRU After the pRRU is powered on, check its running status by observing the indicator status. 4.2 Powering Off the pRRU A pRRU can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 13 DBS3900 LampSite Site Maintenance Guide 4 Powering On and Powering Off the pRRU3901 4.1 Powering On the pRRU After the pRRU is powered on, check its running status by observing the indicator status. Prerequisites The pRRU and the cables are correctly installed. Context NOTE The pRRU must be powered on within 7 days after it is unpacked, and the period of its power-off state cannot exceed 7 days during maintenance. Procedure Step 1 Power on the pRRU. The pRRU can be powered in PoE mode. The RHUB adopts the PoE power supply to provide power for the pRRU over the CPRI_E0 port. Step 2 Wait 3 to 5 minutes. Then Check the status of the RUN indicator on the pRRU3901 or 3GPP indicator on the pRRU3902, pRRU3907 and pRRU3911. Module It Indicates that... If the RUN Indicator Is... pRRU3901 Steady on There is power input, but the board is faulty. Steady off There is no power input. Then... Disable the power supply, rectify the board fault, and then power on the pRRU3901 again. Disable the power supply and check the power input again. On for 1s and off for 1s The pRRU3901 is running properly. End the power-on check task. On for 0.125s and off for 0.125s The board software is being loaded. If the loading is not complete after 5 minutes, disable the power supply. Check whether the data in the configuration file is correct. Rectify the fault and then power on the pRRU3901 again. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 14 DBS3900 LampSite Site Maintenance Guide If the RUN Indicator Is... Blinks white at 4 Hz Module pRRU3902/

pRRU3907/

pRRU3911/

pRRU3916 The pRRU is loading software, configuring data, or it is not running. 4 Powering On and Powering Off the pRRU3901 It Indicates that... Then... Blinks white at 0.5 Hz (on for 1s and off for 1s) The pRRU is working properly and does not transmit power. Is steady white Is steady orange. Blinks orange at 0.5 Hz (on for 1s and off for 1s) Is off The cell is set up and transmits power properly. There is power input, but the hardware is faulty. A minor alarm

(indicating an HDLC link disconnection, for example) is generated. The board is not powered on. Wait until the software is loaded. If the loading is not completed in five minutes, power off the pRRU and check whether the data configuration file is correct. After the fault is rectified, power on the pRRU again. Check whether the services have been configured and power amplification have been enabled on the pRRU. No further action is required. Power off the pRRU, rectify the hardware fault, and then power it on again. Troubleshoot based on the alarm information. Turn off the power supply switch and check whether the power input is normal. If the power input is normal, check for and rectify board faults, and turn on the power supply switch again.

----End Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 15 DBS3900 LampSite Site Maintenance Guide 4 Powering On and Powering Off the pRRU3901 4.2 Powering Off the pRRU A pRRU can be powered off in two ways: normal power-off and emergency power-off. You need to perform a normal power-off in scenarios such as an equipment swap or foreseeable regional blackout, and you need to perform an emergency power-off in emergencies such as a fire, smoke, or water damage in indoor scenarios. Procedure l Normal power-off NOTICE Powering off the pRRU interrupts services, and therefore perform associated operations before a power-off. a. Remove the Ethernet cable. l Emergency power-off Turn off the switch of the external power device. a.

----End Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 16 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices 5 Replacing the Devices About This Chapter This chapter describes the procedures and cautions when replacing the devices. 5.1 Replacing the RHUB The RHUB is an indoor convergence unit. It converges multiple pRRUs to the BBU. Replacing the RHUB interrupts services carried on the serving cell. RHUBs are classified into those with electrical transmission ports and those with no electrical transmission ports. Unless otherwise specified, this document uses the RHUBs with no electrical transmission ports as an example. 5.2 Replacing an Optical Module An optical module provides a port for opto-electronic conversion. This enables the transmission between the RHUB and BBU3900 through the optical fiber. Replacing the optical module requires removing the optical fibers. This interrupts all the services. 5.3 Replacing the pRRU pRRU is an indoor remote radio unit. It processes RF signals. Replacing the pRRU interrupts all the services carried on it. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 17 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices 5.1 Replacing the RHUB The RHUB is an indoor convergence unit. It converges multiple pRRUs to the BBU. Replacing the RHUB interrupts services carried on the serving cell. RHUBs are classified into those with electrical transmission ports and those with no electrical transmission ports. Unless otherwise specified, this document uses the RHUBs with no electrical transmission ports as an example. l A new RHUB is available. l The labels and connections of the cables connected to the RHUB are recorded. l The following tools are available: a Phillips screwdriver, an ESD wrist strap, and a rubber mallet. It takes about 10 minutes to replace the RHUB. l Replace the RHUB installed on a 19-inch rack, in a 19-inch cabinet or in a 19-Inch Shelf. Prerequisites Context Procedure NOTE The procedures for replacing the RHUB installed on a 19-inch rack are the same for replacing the RHUB installed in a 19-inch cabinet or in a 19-Inch Shelf. The following uses the RHUB installed on a 19-inch rack as an example. Power off the RHUB by referring to 3.2 Powering Off the RHUB. a. b. Record the cable connections. c. d. Use a torque screwdriver or Phillips screwdriver to remove the four screws on the Take insulation measures, and then remove all cables from the RHUB. mounting ear of the RHUB, as shown in Figure 5-1. Figure 5-1 Removing the mounting ear Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 18 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices e. Remove the RHUB from the rack. f. Install the new RHUB. For details, see DBS3900 LampSite Installation Guide. NOTICE Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components. g. Connect all the cables to the new RHUB according to the recorded installations. h. i. Power on the RHUB by referring to 3.1 Powering On the RHUB. Determine whether the new RHUB is working properly according to the indicator status on the RHUB. For details about the indicator status, see RHUB Ports and Indicators in DBS3900 LampSite Hardware Description. l Replace the RHUB installed on a wall. Power off the RHUB by referring to 3.2 Powering Off the RHUB. a. b. Record the cable connections. c. d. Use a torque wrench or socket wrench to remove the four expansion bolts on the Take insulation measures, and then remove all cables from the RHUB. mounting ear, and then remove the RHUB, as shown in Figure 5-2. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 19 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices Figure 5-2 Removing the mounting ear e. Install the new RHUB on a wall. For details, see DBS3900 LampSite Installation Guide. NOTICE Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components. Connect all the cables to the new RHUB according to the recorded installations. Power on the RHUB by referring to 3.1 Powering On the RHUB. f. g. h. Determine whether the new RHUB is working properly according to the indicator status on the RHUB. For details about the indicator status, see RHUB Ports and Indicators in DBS3900 LampSite Hardware Description.

----End Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 20 DBS3900 LampSite Site Maintenance Guide Follow-up Procedure 5 Replacing the Devices l Place the replaced RHUB into an ESD box or bag. Then, place the ESD box or bag into a foam-padded carton or the packing box of the new optical module. l Record the information about the faulty component in the fault card. l Contact the local Huawei office to deal with the faulty component. 5.2 Replacing an Optical Module An optical module provides a port for opto-electronic conversion. This enables the transmission between the RHUB and BBU3900 through the optical fiber. Replacing the optical module requires removing the optical fibers. This interrupts all the services. Prerequisites Context l The number and type of faulty optical modules are confirmed, and new optical modules are available. The new optical modules to be installed must match CPRI rates. l The position for installing an optical module and the cable connection are recorded. l The following tools and materials are available: an ESD wrist strap or ESD gloves, and an ESD box or bag. l The optical modules are connected to the CPRI0 and CPRI1 ports on the RHUB panel. l An optical module or CPRI fiber optic cable cannot be inserted into or removed from this CPRI port when the power supply is connected. l Replacing an optical module involves removing an optical fiber and the faulty optical module, installing a new optical module, connecting the optical fiber to the optical module, and recovering the links. The operation takes about 10 minutes. NOTE Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components. Procedure Step 1 Wear ESD gloves. Step 2 Record the optical module and fiber connections. Step 3 Power off the RHUB according to the instructions in 3.2 Powering Off the RHUB. NOTE After removing the optical fiber from the optical module, do not look directly at the optical modules without eye protection. Step 4 Press the latch on the connector of the optical fiber connector, and remove the connector from the faulty optical module, use the dust-proof cap to protect the optical fiber, as shown in Figure 5-3. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 21 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices Figure 5-3 Removing the optical fiber Step 5 Turn the ring-pull on the faulty optical module outwards. Hold the ring-pull and take the faulty optical module out of the slot to remove it from the CPRI0 or CPRI1 port, as shown in Figure 5-4. Figure 5-4 Removing the optical module Step 6 Install the new optical module onto the corresponding CPRI port, as shown in Figure 5-5. Figure 5-5 Installing the new optical module Step 7 Remove the dust-proof caps from the optical module and optical fiber, and connect the optical fiber connector to the new optical module, as shown in Figure 5-6. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 22 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices Figure 5-6 Installing the optical fiber Step 8 Power on the RRU according to the instructions in 3.1 Powering On the RHUB. Step 9 Check whether CPRI signal transmission recovers by observing the CPRI indicator on the RHUB panel. If... The CPRI indicator is green The CPRI indicator is red or in another color Then... CPRI signal transmission recovers and the optical fiber replacement is successful. CPRI signal transmission is abnormal. Check whether the optical fiber and optical module are securely installed. Step 10 Take off the ESD gloves and pack up all the tools.

----End Follow-up Procedure l Place the replaced optical module into an ESD box or bag. Then, place the ESD box or bag into a foam-padded carton or the packing box of the new optical module. l Record the information about the faulty component in the fault card. l Contact the local Huawei office to deal with the faulty component. 5.3 Replacing the pRRU pRRU is an indoor remote radio unit. It processes RF signals. Replacing the pRRU interrupts all the services carried on it. Prerequisites l Replacing the pRRU when:

Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 23 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices The functional modules inside a pRRU or the housing of pRRU is damaged. Adding the RF daughter board or Wi-Fi daughter board. l The hardware type is confirmed and a new pRRU is available. l The labels and connections of the cables connected to the pRRU are recorded. l The following tools are available: an electrostatic discharge (ESD) wrist strap and ESD gloves. It takes about 5 minutes to replace the pRRU. NOTE The pRRU can be installed on a metal pole, wall, or ceiling, and the procedures for replacing the pRRU are almost the same. The following uses a ceiling-mounted pRRU as an example. Context Procedure Step 1 Instruct the network operator to block the pRRU. NOTE The DBS3900 LampSite solution supports immediate block, idle block, and delayed block. Application of idle block and delayed block produces the same effect as application of immediate block. l pRRU3901:

On the UMTS side, log in to the LMT and run the BLK BRD command to block the RF daughter board of the pRRU. On the LTE side, log in to the LMT and run the BLK BRD command to block the RF daughter board of the pRRU. l pRRU3902/pRRU3907/pRRU3911/pRRU3916:

On the UMTS side, log in to the LMT and run the BLK BRD command to block the pRRU. On the LTE side, log in to the LMT and run the BLK BRD command to block the pRRU. Step 2 Wear ESD gloves. NOTE l Take proper ESD protection measures, such as wearing ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components. l A pRRU that has just been powered off has afterheat. Take scald-proof measures when removing the pRRU. Step 3 Power off the pRRU. For details, see 4.2 Powering Off the pRRU. Step 4 Removing the pRRU to be replaced. 1. Record the cable connections. 2. 3. Removing the pRRU. Take insulation measures, and then remove all cables from the pRRU. Removing the pRRU3901. Hold the pRRU3901 case in one hand and pull the hoist clamp on the mounting bracket with the other hand, as shown in step a in Figure 5-7. Then, remove the mounting bracket from the pRRU3901, as shown in step b in Figure 5-7. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 24 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices Figure 5-7 Removing the pRRU3901 Removing the pRRU3902or pRRU3911. Hold the pRRU case in one hand and apply force to the hoist clamp on the mounting bracket with the other hand, as shown in step a in Figure 5-7. Then, remove the mounting bracket from the pRRU, as shown in step b in Figure 5-8. Figure 5-8 Removing the pRRU Removing the pRRU3907or pRRU3916. Remove the two dowels on the top of the attachment plate from the mounting kit, and push the pRRU upwards, as shown by illustrations b and c in Figure 5-9. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 25 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices NOTICE When removing the pRRU, hold the pRRU handle with one hand and support the bottom of the pRRU with the other hand. This prevents personnel injury caused by any falling pRRU. Figure 5-9 Removing the pRRU Step 5 Install the new pRRU. 1. Install the new pRRU. The installation must be based on different scenarios. For details, see DBS3900 LampSite Installation Guide. 2. Connect the cables to the pRRU according to the recorded positions. NOTICE Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to prevent electrostatic damage to the boards, modules, or electronic components. Step 6 Optional: Instruct the network operator to run MOD AP, change the faulty pRRU WIFI MAC to the new pRRU WIFI MAC in AC Window, when pRRU with three transmission ports is configured with Wi-Fi daughter board. Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 26 DBS3900 LampSite Site Maintenance Guide 5 Replacing the Devices Step 7 Power on the pRRU by referring to 4.1 Powering On the pRRU. Step 8 Check whether the new pRRU is working properly according to the indicator status on the pRRU. For details about the indicator status, see the chapter of Ports and Indicators in DBS3900 LampSite Hardware Description. NOTE For details about the ports and indicators of different pRRU models, see:

l pRRU: pRRU3901 Ports and Indicators l pRRU (TDD): pRRU3901 Ports and Indicators l pRRU3902: pRRU3902 Ports and Indicators l pRRU3907: pRRU3907 Ports and Indicators l pRRU3911: pRRU3911 Ports and Indicators l pRRU3911: pRRU3916 Ports and Indicators Step 9 Instruct the network operator to unblock the pRRU. l pRRU3901:

On the UMTS side, log in to the NodeB LMT and run the UBL BRD command to unblock the RF daughter board of the pRRU. On the LTE side, log in to the eNodeB LMT and run the UBL BRD command to unblock the RF daughter board of the pRRU. l pRRU3902/pRRU3907/pRRU3911/pRRU3916:

On the UMTS side, log in to the NodeB LMT and run the UBL BRD command to unblock the pRRU. On the LTE side, log in to the eNodeB LMT and run the UBL BRD command to unblock the pRRU. Step 10 Take off the ESD gloves and pack up all the tools.

----End Issue 07 (2016-05-30) Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 27

Contents Safety Information 1 Safety Information .......................................................................................................................... 2 1.1 General Safety Precautions ........................................................................................................................................... 2 1.2 Installation Environment Requirements ....................................................................................................................... 5 1.2.1 Indoor Installation ...................................................................................................................................................... 6 1.3 Electrical Safety ............................................................................................................................................................ 6 1.4 Radiation Safety............................................................................................................................................................ 7 1.4.1 Electromagnetic Field Exposure ................................................................................................................................ 7 1.5 Mechanical Safety ........................................................................................................................................................ 9 1.6 Maintenance Safety .................................................................................................................................................... 11 Safety Information 1 Safety Information 1.1 General Safety Precautions Read all safety information before installing, operating and maintaining Huawei equipment. To ensure personal and equipment safety during installation, operation and maintenance, follow all safety precautions marked on equipment and described in manuals. Items marked Caution, Warning and Danger in the manual do not indicate all safety precautions to be obeyed, but only serve as a supplement to all safety precautions. The equipment should be used in the environment that meets design specifications. Otherwise, equipment failure may occur, and equipment malfunctions, parts damage, personal safety accidents, property loss and other exceptions resulting from such equipment failure are not within the scope of quality warranty. Definitions Skilled person:

Skilled person is a term applied to persons who have training or experience in the equipment technology, particularly in knowing the various energies and energy magnitudes used in the equipment. Instructed person:

Person who have been instructed and trained by a skilled person, or who are supervised by a skilled person, to identify energy sources that may cause pain and to take precautions to avoid unintentional contact with or exposure to those energy sources. Under normal operating conditions, abnormal operating conditions or single fault conditions, instructed persons should not be exposed to parts comprising energy sources capable of causing injury. Understand potential dangers in operations, and can take proper measures to minimize the dangers. User or operator:

Ordinary person is the term applied to all persons other than instructed persons and skilled persons. Ordinary persons include not only users of the equipment, but also all persons who may have access to the equipment or who may be in the vicinity of the equipment. Conventions Safety Information provide helpful suggestions or reference materials not covered in the document.

: Caution Symbol, prompts users to be cautious. "Caution" items might perform an action that may result in an equipment damage or loss of data.

: Warning Symbol, prompts users to be careful. In this situation, users

: Danger Symbol, indicates critical safety instructions. This warning symbol means a danger. Users are in a situation that could cause bodily injury. Before performing any operation on the equipment, involving electric circuits and understand the standard practices for preventing accidents.

: High Voltage Symbol, indicates a part exposed to a high voltage. This symbol warns operators that direct contact with the power grid voltage, or indirect contact with the power grid voltage through damp stuff or moisture is fatal. The symbol is attached next to a hazardous voltage point or a protective power supply cover that may be removed during maintenance.

: Overheating Symbol, indicates overheating. This symbol is attached to equipment surface that may cause scalds due to a high temperature. The symbol warns users not to touch the equipment during operation or maintenance. Heat insulation gloves should be used to prevent scalds.

: Microwave Symbol, indicates that a device emits microwaves. This symbol warns operators not to unfasten the transmitter output feeder or antenna feeder connector when the transmitter is working. If you need to unfasten the feeder connector or work next to the transmit antenna, turn off the transmitter. The symbol is attached next to the output socket of the transmitter power amplifier or antenna socket of the transmitter combiner to indicate RF radiation. or

: Protective Earthing Symbol, indicates protection earthing. This symbol is attached next to a protection ground terminal, and used next to a terminal connecting equipment and an external ground system. An equipment ground cable is connected to an external ground bar through the protection ground terminal.

: Protective bonding Symbol, indicates equipotential bonding. This symbol is used next to equipotential terminals inside equipment.

: Electrostatic symbol: This symbol is used in all electrostatic sensitive areas. Before operating equipment attached with this symbol, wear ESD gloves or an ESD wrist strap.

: Altitude description symbol: This symbol indicates that equipment is safe to use only below the altitude of 2000 m. Safety Information

: Non-tropical climate symbol: This symbol indicates that equipment is safe to use only in non-tropical climates.

: Symbol on/near a fan box/moving part. This symbol is silkscreened on or attached to a fan box panel to warn operators not to touch the fan with fingers. "Do not touch the blades when the fan is rotating!"

or

: Instruction reading symbol. This symbol is attached to remind instruction reading next to an equipment port to notify a user to read the manual for the usage of the port. Application scenarios of this symbol include but are not limited to:

1. For equipment with multiple power supplies, this symbol is used to replace the multi-

power symbol next to power supplies, which indicates that the equipment has multiple power supplies and all the power supplies must be cut off to power off the equipment. 2. For equipment with multiple input ports, this symbol is used next to the output ports. Read the manual before connection to understand the rated value and configuration information of power output. 3. For equipment with multiple slots, this symbol is used next to the slots. Read the manual to understand the slot information, board restriction and usage conditions. Basic Safety Precautions Instructed person must obtain related certificates after strict training, understand all the required safety regulations, and master correct operation methods before installing, operating and maintaining Huawei equipment. Equipment installation, operation, and maintenance must comply with local laws and regulations. Safety information in the manual only serves as a supplement to local laws and regulations, and:

- Only skilled person and instructed person can install, operate, and maintain equipment.

- Only skilled person and instructed person can remove safety facilities and maintenance equipment.

- Operators should promptly report faults or errors that may cause safety issues.

- Equipment operators, including operators, instructed person and skilled person, should have special operation qualifications required by the local country, such as high-voltage operation, climbing, and special equipment operation qualifications. If personal injury or equipment damage may occur during installation, equipment operators should stop operation immediately, report the situation to the project owner, and take effective protective measures. Installation, operation, and maintenance of outdoor equipment are strictly forbidden in lightning, rainy, snowy, windy and other adverse weather conditions. This includes but not limited to outdoor equipment transportation, cabinet installation, power cable installation, and outdoor cable connection. Do not wear watches, bracelets, bangles, rings, necklaces or other conductive objects during equipment installation, operation and maintenance. Dedicated insulation tools, such as insulation gloves, safety clothing, safety helmet, and safety shoes, must be used during equipment installation, operation, and maintenance, as shown in Figure 1-1. Figure 1-1 Safety personal protective equipment (PPE) Safety Information Equipment installation, operation, and maintenance must follow procedures in the Hardware Installation and Maintenance Guide, Configuration Guide, and Operation and Maintenance Guide. Use a voltmeter to measure the voltage at the contact point to prevent electric shocks before touching any metal surface or terminal. Ensure all slots are inserted with boards or filler panels. Prevent exposure of board hazardous voltage and energy, ensure normal working of ventilation channels, control electromagnetic interference, and prevent dusts or foreign matters from the backplane, mother board, and boards. After equipment installation, users should conduct routine checks and maintenance, and promptly replace faulty parts to ensure equipment safe running as required by the Hardware Installation and Maintenance Guide and Operation and Maintenance Guide. After equipment installation, clear equipment area and remove empty packaging materials, such as the carton box, foam, plastics, and cable ties. In case of fire, evacuate from the building or equipment area and press the fire alarm bell, or call the fire emergency number. Do not enter the burning building again in any cases. 1.2 Installation Environment Requirements Ensure the installation environment comply with equipment specifications, including the voltage, temperature, humidity, altitude, pollution degree, overvoltage category , and waterproof and dustproof classification. Do not place the equipment in a flammable, explosive gas or smog environment, or perform any operation in such environment. Keep acidic, alkaline or other corrosive gases away from the installation site. Keep the equipment away from sources of heat or fire, such as the electric heater, microwave oven, oven, water heater, fireplace fire, candle or other places that may Safety Information generate high temperatures. Otherwise, equipment housing will melt or the equipment will be heated and cause a fire. When the equipment is running, do not obscure or cover it with flammables, such as paper and cotton fabrics. Otherwise, heat dissipation of the equipment fails, which will cause housing deformation and a fire. The equipment (or system) must be installed and used in specified areas. Do not block air vents when the equipment is running. Keep air vents at a distance from the wall or other objects that block the air vents as required in the Hardware Installation and Maintenance Guide. The minimum distance is generally 5 cm if it is not specified. The equipment that cannot meet IP54 waterproof and dustproof standard cannot be used in outdoor environments. 1.2.1 Indoor Installation Ensure there is no water penetration, leakage or condensation (in case of air conditioner failure in the equipment room) on the equipment top. Otherwise, water may flow into the equipment, causing equipment failure. If fixed equipment has a large hole at the bottom, the equipment must be installed on concrete, tile or non- combustible surface. Prevent rats and pests from the installation site. Wall Installation Before drilling holes on the wall, ensure there is no circuit, water conduit or gas pipeline in the wall area to be drilled to avoid body injury. Do not place any flammables or explosive objects above or under the equipment, and do not obscure the equipment with foreign objects within 1 m scope. In wall installation mode, ensure no hole facing upwards to prevent water ingress and equipment damage. Ensure screws are securely installed. Otherwise, the equipment may fall due to tension after cable connection, causing equipment damage or even personnel injury. 1.3 Electrical Safety Grounding Before grounding, ensure the protection ground is reliably grounded in accordance with local building distribution specifications. For the equipment requiring grounding, connect the protective earthing cable essential before equipment installation, and disconnect the protective earthing cable after the equipment is removed. For the equipment using a socket with earthing terminal, ensure the earthing terminal is connected to the protective earthing essential. AC/DC Operation Requirements Safety Information The supply voltage of the power system is hazardous, and direct contact or indirect contact through damp stuff with the voltage may cause electric shocks. Irregular and incorrect operations may cause accidents, such as a fire and electric shocks. Before equipment electrical connection, disconnect the related external-equipment breaker. Before connecting the load (electrical equipment) or battery cable, verify that the input voltage is within the rated voltage range of the equipment. Before power-on, verify that equipment electrical connections are correct. Cabling Requirements If the power cable is prepared at the site, only the insulation layer at the wiring part can be cut. Otherwise, it may cause short circuit and accidents such as body injury and a fire. Insulation layer aging or damage may occur when the cable is used in a high-temperature environment. Leave enough distances between the cable and power busbar, current shunt, fuse, heat sink and other heating devices. The signal cable and the strong current cable or high-voltage cable must be bound separately. Cables provided by the customer must comply with local cable regulations. Do not route any cable through the air exhaust vent in the cabinet. If cables are stored in an ambient temperature below 0C, move the cables to a room temperature environment and store the cables for more than 24 hours before installation ESD Requirements To avoid component damage caused by electrostatic on human body, wear ESD gloves or an ESD wrist strap and properly ground the other end of the ESD wrist strap before touching a circuit board. Hold the board edge where no components are installed, and do not touch chips with hands. Put removed boards in ESD packing for storage or transportation. 1.4 Radiation Safety 1.4.1 Electromagnetic Field Exposure This section describes safety precautions related to electromagnetic field exposure. Strong electromagnetic signals harm human health. Safety Information If the equipment is a radio transmitter or product supporting radio transmission, exposure of radio electromagnetic field (electromagnetic radiation) should be considered. For the high-voltage equipment or facility, exposure of power frequency electromagnetic field should be considered. When professional equipment or facility (such as wireless base station transceiver) is deployed, the user (such as radio service carrier) must comply with local laws and regulations. Before the equipment structure or antenna is modified, re-evaluation of electromagnetic field exposure should be considered. Before the radio frequency (RF) output specifications or parameters are modified, re-

evaluation of electromagnetic field exposure should be considered. Before the site environment of professional equipment or facility is changed, re-

evaluation of electromagnetic field exposure should be considered. Restricted Area of Electromagnetic Field Exposure An area with excessive electromagnetic field exposure (restricted area) is a hazardous area at a certain distance from the equipment or facility as required by exposure control limits of related regulations, so as to control public or operator exposure to electromagnetic field. Take proper measures to ensure the safe distance from electromagnetic field exposure, including but not limited to:

Plan the professional equipment or facility site in an inaccessible area to the public, and do not publicize the location. Allow only authorized and instructed person to access the professional equipment or facility site. Before entering the area with excessive electromagnetic field exposure, professional personnel should know the location of the restricted area and shut down the transmitter. Set clear signs at the site to remind professional personnel that the current location is in or may be in the area with excessive electromagnetic field exposure. After site installation, conduct regular monitoring and checks. Set effective physical shields and apparent warning signs in all areas with excessive electromagnetic field exposure. Install an isolating device outside the equipment structure. Comply with local regulations in operations. Installation and Use of a Wireless Base Station Transceiver A base transceiver station (BTS) is properly designed so that its RF electromagnetic radiation is under the related standard limits of RF radiation hazard. Therefore, a normal working BTS does no harm to the public and working personnel. However, a BTS with defective antenna cables or other defects may result in excessive RF electromagnetic radiation. Professional personnel should abide by the following rules in BTS installation and operation:

Before installing and operating a BTS and its antenna, read safety recommendations and comply with local regulations. Before installing or maintaining an antenna close to the tower or mast with a BTS and its antenna, contact related personnel to shut down the antenna transmitter. If necessary, working personnel at the site should carry radiation monitoring and alarm instrument. Safety Information To ensure safety of public electromagnetic field exposure, abide by the following guiding principles in BTS antenna site installation:

In rooftop installation, install antennas at a height over the height of personnel who may work or live on the rooftop. In rooftop installation, install transmit antennas far away from most visited areas, such as the rooftop access point, telephony service point, and HVAC equipment. In rooftop installation, install directional antennas peripherally and do not make them face towards buildings. Properly choose from large antennas (better signal coverage) and small antennas (less visual impact). Install antennas at a far site, although it may be mutually exclusive to local area requirements. When constructing a common installation site, pay special attention to antennas from different manufacturers, especially high-power broadcasting (FM/TV) antennas. Antennas are generally installed in one common site locally, which may increase safety risks. Take special preventive measures at antenna sites next to hospitals or schools. Use of Other Wireless Equipment If any related equipment manual specifies the safe distance of electromagnetic field exposure, this distance requirement should be applied. No application distance is specified for the equipment with low RF transmit power that meets electromagnetic field exposure requirements. No application distance is specified for the equipment with special design that meets electromagnetic field exposure requirements in close use. Use of High-voltage Equipment or Facility Only the power frequency electromagnetic field generated by high-voltage (for example, over 100 kV) equipment or facility are harmful to human. Therefore, the electromagnetic field needs to be evaluated according to related requirements. 1.5 Mechanical Safety Hoisting Safety Do not walk under the crane arm or hoisted objects when heavy objects are being hoisted. Hoisting operators must be trained and qualified before starting to work. Hoisting tools must be check to ensure tool completeness. Before hoisting, ensure that hoisting tools are securely fastened to fixed load-bearing objects or wall. During hoisting, ensure angles between lifting slings are not larger than 90, as shown in Figure 1-2. Figure 1-2 Hoisting heavy objects Safety Information Ladder Use Safety Before using a ladder, check whether the ladder is intact and confirm its load bearing capacity. Do not use it with overload. The recommended angle between the ladder and the ground is 75. You can use a right angle to measure the angle, as shown in Figure 1-3. Place the wider ladder legs at the bottom or take protective measures at the bottom to avoid skid. Place the ladder on a stable surface. Figure 1-3 Ladder tilt angle Pay attention to the following points when climbing a ladder:

Prevent your center of gravity from deviating from the ladder edge. Keep your body stable before climbing to ensure safety. Do not climb over the fourth beam from the ladder top. Safety Information To climb up to a rooftop, the vertical height of the ladder above the rooftop must be more than 1 m, as shown in Figure 1-4. Figure 1-4 1 m vertical height of the ladder above the rooftop Drilling Safety Pay attention to the following safety precautions when drilling holes on the wall or ground. Do not drill holes on cabinets. Incorrectly drilled holes will damage cabinet electromagnetic shielding performance and internal cables. Metal scraps generated in drilling will cause short circuit on circuit boards in a cabinet. Wear goggles and protective gloves in drilling. Cover equipment before drilling to prevent metal scraps from entering equipment interior. Timely clear and eliminate metal scraps after drilling. Heavy Object Transport Safety Prepare for load bearing in heavy object transport to avoid injury or sprain. When transporting a cabinet, keep your back straight and move steadily to avoid sprain. When transporting equipment with hands, wear protective gloves to avoid cut by edges. When moving or lifting a shelf, hold shelf handles or bottom edge, instead of handles of installed models in the cabinet, such as power modules, fan modules and boards. 1.6 Maintenance Safety Before replacing accessories or parts, wear an ESD wrist strap, and ensure the other end of the ESD wrist strap is grounded and the other end is properly contacted with skin. When replacing parts, take care of parts, bolts, and tools to prevent them from dropping into fans can damaging fans or equipment. When replacing shelves or parts in the cabinet, carefully pull the shelves or parts out from the cabinet to prevent unstable or heavy devices on the cabinet from causing injury or strain. Replaceable Fuse Safety Information Use fuses of the same type and same rating to replace old ones. Before replacing the fuse on the panel, disconnect the equipment power supply. Otherwise, an energy hazard or electric shock may occur, causing body injury. Replaceable fuses are installed on the panel next to the AC/DC power input port or output port. Reference the specifications of backup fuses or fuses on the panel to select the fuse type for replacement. Using different fuses of different specifications may cause equipment damage, body injury, and financial loss. Fuse Welding If the fuse rated value is silkscreened on the board, Huawei authorized personnel replace fuses according the silkscreened specifications. If the fuse rated value is not silkscreened on the board, do not maintain board fuses at site. Return them for depot repair. To replace fuses, Huawei authorized personnel replace the fuses according to the supplier model and rated value in the bill of materials (BOM).

Regulatory Compliance Statement Issue Date HUAWEI TECHNOLOGIES CO., LTD. Copyright Huawei Technologies Co., Ltd. 2010. 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 the 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 () Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. i Revision Records Date Version Descriptions Author Issue () Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. i 1 Regulatory Compliance Information 1 Regulatory Compliance Information About This Chapter 2.1 Regulatory Compliance Standards 2.3 U.S.A Regulatory Compliance 2.4 Canada Regulatory Compliance 2.10 RF Exposure (Health) Information 2.11 Other Markets 1.1 Regulatory Compliance Standards Prru3916 complies with the standards listed in Table 1-1. Table 1-1 Regulatory compliance standards Discipline EMC Standards The pico Remote Radio Unit complies with the following standards related to electromagnetic compatibility:

CISPR 22 EN 55022 EN 301 489-17 EN 301 489-23 CISPR 24 IEC 61000-4-2 IEC 61000-4-3 IEC 61000-4-4 IEC 61000-4-5 IEC 61000-4-6 IEC 61000-4-29 GB 9254 ETSI 301 489-1 VCCI V-3 Issue () Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1-1 Discipline RF Safety standards Environmental standards ETL 1 Regulatory Compliance Information Standards 3GPP:

Release 99 Release 4 Release 5 Release 6 Release 7 Release 8 Release 9 Release 10 AS/NZS60950-1 AS/NZS60950-22 EN 60950-1 EN 60950-22 IEC 60950-1 ETSI EN300019-1-1 ETSI EN300019-1-2 ETSI EN300019-1-3 ETSI EN300019-2-1 ETSI EN300019-2-2 ETSI EN300019-2-3 IEC 60068-2-2 Conforms to UL STD.60950-1 CERTIFIED TO CSA STD.C22.2 NO.60950-1 The follow figure shows the identity of ETL:

Issue () Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1-2 Discipline NOTE 1 Regulatory Compliance Information Standards 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 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 1.2 U.S.A Regulatory Compliance 1.2.1 FCC Part 15 pRRU3916 complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

This device does not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operation. If this device is modified without authorization from Huawei, the device may no longer comply with FCC requirements for Class B digital devices. In that a case, your right to use the device may be limited by FCC regulations. Moreover, you may be required to correct any interference to radio or television communications at your own expense. This device has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses and radiates radio frequency energy. If it is not installed and used in accordance with the instructions, it may cause harmful interference to radio communications. Issue () Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1-3 1 Regulatory Compliance Information However, there is no guarantee that interference will not occur in a particular installation. If this device does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user may take one or more of the following measures:

Reorient or relocate the receiving antenna. Reinforce the separation between the device and receiver. Connect the device into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio or TV technician for assistance. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user authority to operate the equipment. 1.3 Canada Regulatory Compliance 1.3.1 RSS-Gen statement This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. 1.3RF Exposure (Health) Information This equipment complies with relevant RF radiation exposure limits set forth for a public/uncontrolled environment. This equipment should be installed and/or operated with a minimum distance as below between the radiator and your body. Issue () Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1-4 The minimum Safe Distance: 0.986 meters. 1 Regulatory Compliance Information 1.4 Other Markets For relevant compliance information/documentation for markets not mentioned above, please contact Huawei representative Issue () Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd. 1-5