FCC ID: PX8IRCU-C414 Internal Remote Control Unit

IRCU Internal Remote Control Unit (IRCU) User Manual V1.3 Page 1 of 25 Foreword This user manual describes the basic use of electrical tilt antenna connected to the Internal Remote Control unit (IRCU). Due to different equipment and software upgrade, some description in this manual may differ from the actual use. Information contained in this document is subject to change without prior notice Page 2 of 25 1.0 2.0 2.1 2.2 2.3 2.4 3.0 4.0 4.1 4.2 5.0 5.1 5.1.1 5.1.2 5.1.3 5.2 5.2.1 5.2.2 5.2.3 5.3 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.3.6 5.4 5.4.1 5.4.2 6 6.1 6.2 4.3 Two BTS Working Principle ........................................................................................................ 6 Table of Contents Safety Precautions ..................................................................................................................... 4 Overview .................................................................................................................................... 4 Main Purpose and Scope of Application .................................................................................... 4 Model Description...................................................................................................................... 4 Normal Working Conditions and Environment .......................................................................... 4 Dimensions and Weight ............................................................................................................. 4 IRCU Specification ...................................................................................................................... 5 RET System and Working Principle ............................................................................................ 5 RET System ................................................................................................................................. 5 Working Principle ....................................................................................................................... 5 IRCU Installation and Connection ............................................................................................ 12 Installation Requirements ........................................................................................................ 12 Control Cable Requirements .................................................................................................... 12 Power Supply ........................................................................................................................... 12 Installation Tools ..................................................................................................................... 12 IRCU Installation ....................................................................................................................... 12 IRCU-302, IRCU-502, IRCU-602 installation steps and methods .............................................. 12 IRCU-C814 installation steps and methods .............................................................................. 14 Connection between IRCU, PCU and Antenna Systems .......................................................... 16 Mapping of IRCU RET port to Phase Shifter & Scanning Mode ............................................... 17 Mapping of IRCU-302 to Phase Shifter .................................................................................... 19 Mapping of IRCU-502 to Tilt Ruler ........................................................................................... 19 Mapping of IRCU-602 to Tilt Ruler ........................................................................................... 20 Mapping of IRCU-C414 to Tilt Ruler ......................................................................................... 20 Mapping of IRCU-C814 to Tilt Ruler ......................................................................................... 21 Scanning Mode of IRCU ........................................................................................................... 21 IRCU Control Cable, Lightning Protection and Grounding cables ............................................ 22 Control cable, Lightning Protection and Grounding requirements ......................................... 22 Grounding Kit Installation Procedure ...................................................................................... 24 Transportation and Storage ..................................................................................................... 24 Transportation ......................................................................................................................... 24 Storage ..................................................................................................................................... 24 Page 3 of 25 1.0 Safety Precautions Install safety sign onsite to let public know that area is dangerous for public; operating personnel must use Protection Equipment during work. Pay attention for any high Voltage cable around during installation, be careful and avoid electrical shock. Make sure Antenna installed in protection angle of the tower Lightning rod. Grounding Cable must be installed, make sure the grounding resistance lesser than 5. 2.0 Overview 2.1 Main Purpose and Scope of Application IRCU is a controller for electrical tilt enabled antenna to perform remote electrical tilting. It meets AISG2.0 standards, suitable to be use with all Ericsson, Nokia, Huawei, and ZTE AISG 2.0 Base Station. 2.2 Model Description 2.3 Normal Working Conditions and Environment 1. Ambient temperature: -40 to +60 2. Power supply: DC +10 V to +30 V 2.4 Dimensions and Weight 1. IRCU outline shown in Figure 1. IRCU-602 IRCU-502 IRCU-302 Page 4 of 25 IRCU-C 4 1 4 Quantity of AISG Ports Edition Series Control Internal Remote Control Unit 3 5 116 3 5 116 1 2 324 42mm 3 5 100 IRCU-C414 IRCU-C814 Figure 1 IRCU Outline 2. Size and weight are shown in Table 1. Model IRCU-302 IRCU-502 IRCU-602 IRCU-C414 IRCU-C814 Dimensions Weight/kg Package Size

(L W H)/mm

(Approximate)

(L W H)/mm 100x53x26 116x53x26 116x53x26 128x130x31 125x146x55 0.2 0.3 0.3 0.6 1.3 142x108x60 142x108x60 142x108x60 TBD TBD Table 1 IRCU Dimensions and Weight 3.0 IRCU Specification For IRCU specification please refer to IRCU Datasheet IRCU. IRCU tilting angle with adjustment accuracy of 0.1 . 4.0 RET System and Working Principle 4.1 RET System Remote Electrical Tilt (RET) system consists of two major part, electrical tilt enabled antenna and controller. 4.2 Working Principle IRCU obtains control information or number of motor rotation pulse throughout calibration. By adjusting the motor rotation of IRCU, it is able to gain movement control of the phase shifter in an antenna, and thus able to control antenna electrical tilt angle. While maintaining real time communication between IRCU and PCU (Portable Control Unit), PCU send control command to IRCU; IRCU will return the control result to PCU, and PCU act as Human-Machines interface. Page 5 of 25 0 3 1 128 5 2 1 146 4.3 Two BTS Working Principle IRCU-Cx14(x=4 or 8) serial has two pairs of AISG ports, is able to support 2 BTS control the common antenna. IRCU-Cx14 it has two buses but share one configuration file and uniqueID. IRCU-C414 is integrated 4 motors inside, IRCU-C814 is 8 motors. The two pairs of AISG ports has no difference on function but priority, any band can be assigned by AISG port no matter AISG1 or2, if the band is not configured by the another AISG port. If IRCU-C814 doesnt be configured yet, 2BTS both can get 8 bands information through scanning, shown in table 2 Table 2 IRCU Device Information If a band is configured by a AISG port, then the another AISG ports cant see and control the band. Only the first AISG port agree and hand over the control right, then the other AISG port can see it through scan. For instance, A BTS connects to IRCU-C814 AISG 1, B BTS connects to AISG 2, A BTS has already configured band No 2, 3 and 5, B BTS only can see serial band No 1, 4, 5, 6, 7, and 8 information through scanning, as shown in table 3. Table 3 IRCU Device Information shown in B BTS If B BTS configurate band No 1, 4 and 6, A BTS rescan IRCU only can see band No 2, 3,5, 7 and 8 after rescanning shown table 4. Page 6 of 25 Table 4 IRCU Device Information shown in A BTS After A&B BTS finish the configuration, the final configuration like Figure 2-1, band No. 7 &8 are available for configured. Figure 2 IRCU configuration Page 7 of 25 ODI Antenna 4 5 6 3 2 1 7 8 A BTS Configured B BTS Configured Vacant Drive Unit 1-8 IRCU-C814 AISG Port A BTS B BTS NOTICE:

2 BTS concurrent operation IRCU-Cx14 does not support 2 BTS scan, calibration, set tilt, update configuration file, update firmware simultaneously. Table 5 is the conflict outline for 2 BTS operation simultaneously. BTS1/BTS2 Scan Calibration Set Tilt Restoration Restoration Config file Upload Informatio Firmware Update X X X X X X X X L2 X X L7 X X X X X X X X X X X X X X X X X X X X Set Device Data X X n X X Xnot support 2 BTS concurrent operation support 2 BTS concurrent operation Table 5 2 BTS operation simultaneously notice X X X Scan Calibration Set Tilt Restoration L2 L7 Restoration Upload Config file Firmware Update Information Set Device Data a) Scan IRCU-Cx14 do not support 2 BTS scan IRCU simultaneously. If one AISG port is scanning, the another AISG port is available to calibration, set tilt, L2/7 restoration, get IRCU information, set device data but upload configuration file and update firmware. When A BTS is scanning, if B BTS send order to IRCU, the impact to A BTS is shown in table 6 B BTS operation Scan Calibration Set Tilt L2 /L7 Restoration Upload Configuration File Update Firmware Achieve Information Set Device Data If IRCU Support Support, but if A BTS has configured bands, then the bands cant see in B BTS Support Support Support Support Support Support Support Table 6 Influence on A BTS if B BTS has configured bands, then the bands cant see in A BTS No effort No effort No effort Maybe broken link Maybe broken link No effort No effort Page 8 of 25 b) Calibration IRCU-Cx14 do not support 2 BTS to do calibration simultaneously. If one AISG port is calibrating, the another AISG port is available to scan, L2/7 restoration, get IRCU information, set device data but set tilt, upload configuration file and update firmware. When A BTS is calibrating, if B BTS send order to IRCU, the conflict between BTS A&B is shown in table 7. B BTS operation Scan Calibration Set Tilt L2 /L7 Restoration Upload Configuration File Update Firmware Achieve Information Set Device Data Influence on A BTS No effort No effort No effort No effort Maybe broken link Maybe broken link No effort No effort If IRCU Support Support Reply busy Reply busy Support Maybe broken link Maybe broken link Support Support Table 7 c) Set Tilt IRCU-Cx14 do not support 2 BTS to do set tilt on a band simultaneously. If one AISG port is setting tilt, the another AISG port is available to scan, L2/7 restoration, get IRCU information, set device data but calibration, upload configuration file and update firmware. When A BTS is setting tilt, if B BTS send order to IRCU, the conflict between BTS A&B is shown in table 8. B BTS operation Scan Calibration Set Tilt L2 /L7 Restoration Upload Configuration File Update Firmware If IRCU Support Support Reply busy Reply busy Support Maybe broken link Maybe broken link Influence on A BTS

No effort No effort No effort Maybe broken link Maybe broken link or reply WorkingSoftwareMissing No effort No effort Achieve Information Set Device Data Support Support Table 8 d) L2 /L7 Restoration IRCU-Cx14 support 2 BTS to restore L2 or L7 simultaneously. If one AISG port is restoring L2 or L7, do not suggest the another AISG port to do any operation as when the restoration finish, IRCU will be reset. Page 9 of 25 e) Upload Configuration File IRCU-Cx14 do not support 2 BTS to upload configuration file simultaneously. If one AISG port is uploading configuration file, do not suggest the another AISG port to do any operation as IRCU will be broken link after uploading finish. f) Update Firmware IRCU-Cx14 do not support 2 BTS to update firmware simultaneously. If one AISG port is updating firmware, do not suggest the another AISG port to do any operation as IRCU will be broken link after updating firmware finish. g) Achieve Information IRCU-Cx14 support 2 BTS achieve IRCU information simultaneously. If one AISG port is achieving IRCU information, the another AISG port is also available to scan calibration, set tilt, L2/7 restoration, set device data but upload configuration file and update firmware. When A BTS is achieving IRCU information, if B BTS send order to IRCU, the impact to A BTS is shown in table 9. B BTS operation Scan Calibration Set Tilt L2 /L7 Restoration Upload Configuration File Update Firmware Achieve Information Set Device Data Influence on A BTS No effort No effort No effort No effort Maybe broken link Maybe broken link No effort No effort If IRCU Support Support Support Support Support Support Support Support Support Table 9 h) Set Device Data IRCU-Cx14 support 2 BTS set device data simultaneously. If one AISG port is setting device data, the another AISG port is also available to scan calibration, set tilt, L2/7 restoration, get IRCU information but upload configuration file and update firmware. When A BTS is setting device data, if B BTS send order to IRCU, the impact to A BTS is shown in table 10 B BTS operation Scan Calibration Set Tilt L2 /L7 Restoration Upload Configuration File Update Firmware Achieve Information Set Device Data Influence on A BTS No effort No effort No effort No effort Maybe broken link Maybe broken link No effort No effort If IRCU Support Support Support Support Support Support Support Support Support Table 10 Page 10 of 25 i) Caution: The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: This equipment 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 equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help. Page 11 of 25 IRCU Installation and Connection 5.0 5.1 Installation Requirements 5.1.1 Control Cable Requirements Control Cable connector:

Meet the requirements of IEC60130-9 8-pin connector. End of cable are composition of Male and Female Connectors, connector and cable core meet the AISG interface standard requirements. Cable:

Composition of 5 core with metal and plastic protective layer shielding cable, core diameter requirements: 3 0.75mm + 2 0.32mm. Protection class:

IP65. 5.1.2 Power Supply IRCU Input Power: DC +10 V ~ +30 V 5.1.3 Installation Tools 32mm open-end Torque wrench x 1. 5.2 IRCU Installation IRCU-302, IRCU-502, IRCU-602 installation steps and methods 5.2.1 a) As shown in Figure 3-1, "AISG OUT" logo on Antenna cover need to align with IRCU IN and OUT, then insert IRCU into antenna mounting slot. Figure 3-1 IRCU Installation Page 12 of 25 b) As shown in Figure 3-2, tighten screws on IRCU using a slotted type screwdriver. Figure 3-2 IRCU Installation c) Figure 3-3, connect the control cable to the AISG Connector locate at the lower part of the IRCU and tighten the connector. Figure 3-3 AISG Control Cable to PCU d) If there is more than one IRCU need to be connect, daisy-chained cascade method can be used as show in Figure 3-4. Page 13 of 25 Figure 3-4 Multiple IRCU Daisy-Chain Cascade Schematic Diagram

**Note: The control cables and IRCU connectors at both ends were Male and Female connector. IRCU male connector used to receive Input Signal and connect with female connector of control cables; IRCU female connector used to transmit output signal and cascade in series to another IRCU using male cable connector. Control cables from PCU only can be connect to the male connector of IRCU. e) Water proof: Firstly wrap three layers of waterproof tape, then wrap three layers of insulating tape, fastened with cable ties at both ends. 5.2.2 IRCU-C814 installation steps and methods a) As shown in Figure 4-1, "AISG OUT" logo on Antenna cover need to align with IRCU IN and OUT, then insert IRCU into antenna mounting slot. Figure 4-1 IRCU Installation Page 14 of 25 IRCU-C814 AISG port logo b) As shown in Figure 4-2, tighten screws on IRCU using a slotted type screwdriver. Figure 4-2 IRCU Installation c) Figure 4-3, connect the control cable to the AISG Connector locate at the lower part of the IRCU and tighten the connector. Figure 4-3 AISG Control Cable to PCU Page 15 of 25 Screw Screw d) If there is more than one IRCU need to be connect, daisy-chained cascade method can be used as show in Figure 4-4. Figure 4-4 Multiple IRCU Daisy-Chain Cascade Schematic Diagram

**Note: The control cables and IRCU connectors at both ends were Male and Female connector. IRCU male connector used to receive Input Signal and connect with female connector of control cables; IRCU female connector used to transmit output signal and cascade in series to another IRCU using male cable connector. Control cables from PCU only can be connect to the male connector of IRCU. e) Water proof: Firstly wrap three layers of waterproof tape, then wrap three layers of insulating tape, fastened with cable ties at both ends. Connection between IRCU, PCU and Antenna Systems 5.2.3 Connection between IRCU, PCU and antenna system connections are shown in Figure 5. There are three connections, namely:

Figure 5(a): IRCU directly connected with the PCU via the control cable;

Figure 5(b): IRCU connected with antenna system terminal SBT (Smart Bias-T), PCU and the base station apparatus connected to the end of SBT, the control signal transmitted thru the RF feeder. Figure 5(c): IRCU connected with AISG interface enable TMA, PCU and the base station apparatus connected to the end of SBT, the control signal transmitted thru the RF feeder. Page 16 of 25 Antenna Antenna Antenna AISG IN AISG OUT AISG IN AISG OUT AISG IN AISG OUT Daisy Chain Connection Daisy Chain Connection Cable PCU PCU-H002 Figure 5 IRCU, PCU and Antenna System Connection Diagram 5.3 Mapping of IRCU RET port to Phase Shifter & Scanning Mode Comba existing IRCU products can satisfy 1 to 8 RET phase shifter control. All control and driver chip are integrated into single IRCU module whereby the usage of IRCU can be further categorized. The relative specifications are as shown in Table 11. It may be noted that Comba R&D, with the current technical skills, is able to rapidly develop a series of new IRCU module containing higher number of driving control unit, so as to meet the requirement of in-built RCU electrical tilt antenna with higher number of frequency bands supported. Parameter Product No. of Motor Driving Control Unit Suitable RET Antenna Installation Manner 1 to 3 freq band build-in RCU RET Antenna 1 to 4 freq band build-in RCU RET Antenna 4 to 5 freq band build-in RCU RET Antenna 6 freq band build-in RCU RET Antenna 5 to 8 freq band build-in RCU RET Antenna Plug and play Plug and play Plug and play Plug and play Plug and play 3 4 5 6 8 Table 11 IRCU in relation to Antenna Suitability IRCU-302 IRCU-C414 IRCU-502 IRCU-602 IRCU-C814 Page 17 of 25

(a)

(b)

(c) Antenna Antenna Antenna SBT AISG TMA SBT SBT BTS PCU PCU-H002 Comba IRCU products, as shown in Figure 6, employ the usage of socket, so as to realize the plug-and-play function whereby the IRCU can be easily installed or uninstalled. It greatly enhances the reliability of the product in term of connection and utilization. Also, the maintenance is greatly simplified. Figure 6 IRCU-302 Plug-and-play Installation Figure 6 IRCU-C814 Plug-and-play Installation Soft PCB connecting to Driver Unit/Motor Internal spline to connect phase shifter Page 18 of 25 5.3.1 Mapping of IRCU-302 to Phase Shifter Each Driver Unit/Motor comes with own serial number whereby for Figure 7 below, 3 set of serial numbers will be displayed on PCU when connected. Figure 7 Mapping of IRCU-302 to Phase Shifter 5.3.2 Mapping of IRCU-502 to Tilt Ruler Each Driver Unit/Motor comes with own serial number whereby for Figure 8 below, 5 set of serial numbers will be displayed on PCU when connected. Figure 8 Mapping of IRCU-502 to Phase Shifter Page 19 of 25 ODI Antenna P h a s e S h i f t e r 1 P h a s e S h i f t e r 2 P h a s e S h i f t e r 3 Drive Unit 1 Drive Unit 2 Drive Unit 3 IRCU-302 AISG Port ODI Antenna P h a s e S h i f t e r 3 P h a s e S h i f t e r 2 P h a s e S h i f t e r 1 P h a s e S h i f t e r 4 P h a s e S h i f t e r 5 Drive Unit 3 Drive Unit 2 Drive Unit 1 Drive Unit 4 Drive Unit 5 IRCU-502 AISG Port 5.3.3 Mapping of IRCU-602 to Tilt Ruler Each Driver Unit/Motor comes with own serial number whereby for Figure 9 below, 6 set of serial numbers will be displayed on PCU when connected. Figure 9 Mapping of IRCU-602 to Phase Shifter 5.3.4 Mapping of IRCU-C414 to Tilt Ruler Each Driver Unit/Motor comes with own serial number whereby for Figure 10 below, 4 set of serial numbers will be displayed on PCU when connected. Figure 10 Mapping of IRCU-C414 to Phase Shifter Page 20 of 25 ODI Antenna P h a s e S h i f t e r 3 P h a s e S h i f t e r 4 P h a s e S h i f t e r 5 P h a s e S h i f t e r 2 Drive Unit 3 Drive Unit 4 Drive Unit 5 Drive Unit 2 P h a s e S h i f t e r 6 Drive Unit 6 P h a s e S h i f t e r 1 Drive Unit 1 IRCU-602 AISG Port ODI Antenna P h a s e S h i f t e r 1 P h a s e S h i f t e r 2 P h a s e S h i f t e r 3 P h a s e S h i f t e r 4 Drive Unit 1-4 IRCU-C414 AISG Port 5.3.5 Mapping of IRCU-C814 to Tilt Ruler Each Driver Unit/Motor comes with own serial number whereby for Figure 11 below, 8 set of serial numbers will be displayed on PCU when connected. Figure 11 Mapping of IRCU-C814 to Phase Shifter 5.3.6 Scanning Mode of IRCU For compatibility with different BTS/NodeB, Comba R&D designs 2 different modes of IRCU scanning: Single-mode and Multi-mode*. IRCU-302, IRCU-502 and IRCU-602 both support Single-mode and Multi-mode, IRCU-C414 and IRCU-C814 support Single-mode. Single-mode is the default setting for all IRCU but both modes actually have no difference in term of function controlling. Taking IRCU-302 for example, being used in 3 frequency band build-in RCU RET antenna and in 3 sectors deployment as shown in Figure 12:

A1 A2 B1 B2 A3 B3 C1 C2 C3 A C Figure 12 Three Tri-band ODI Antenna

*If operators wish to use multi-mode, kindly contact supplier to provide .bin file configuration. Page 21 of 25 B ODI Antenna P h a s e S h i f t e r 4 P h a s e S h i f t e r 5 P h a s e S h i f t e r 6 P h a s e S h i f t e r 3 P h a s e S h i f t e r 7 P h a s e S h i f t e r 8 P h a s e S h i f t e r 2 P h a s e S h i f t e r 1 Drive Unit 1-8 IRCU-C814 AISG Port Single-mode scan: For this mode, all the devices will be shown independently. No sub-

devices. Figure 13 Single-mode Scanning with Main Devices only Multi-mode scan: When BTS/NodeB start scanning with multi-mode, 3 main devices (A, B and C) are detected first, then their sub-devices (A1, A2, A3, B1, B2, B3, C1, C2, C3) can be controlled independently. Figure 14 Multi-mode Scanning with Main Devices & Sub-devices 5.4 IRCU Control Cable, Lightning Protection and Grounding cables 5.4.1 Control cable, Lightning Protection and Grounding requirements IRCU control cable can connect through SBT or TMA (as shown in Figure 5 (b), (c)), normally control cable will be short and not more than 2m, lighting protection and grounding will be implemented along the RF feeder and hence it is not necessary for control cable to carry out lightning Protection and grounding again. However, if IRCU and control cable are connected as Figure 5 (a), whereby control cable connect to RCU directly, then it is necessary for the cable control to proceed with Lightning Protection and Ground requirement. Details as follows:

Page 22 of 25 a) Control cables that connect to base station antenna should be within the scope of protection of the air terminals. Air terminals shall establish special lightning current deflectors, materials suitable are 4mm x 40 mm galvanized flat steel. b) Control cables metal sheath should be clamp to grounding kit within 1m of antenna, 1m within the cable tray at the bottom of the tower, and 1m before entering base station shelter. Make sure grounding cable is installed property, feeder window of the shelter room should be close to the ground and properly connect to the grounding bar that leads to the ground. (See Figure 15) Figure 15 c) Control cables metal sheath attach to grounding kit as shown in Figure 16. Control Cable Grounding Kit Grounding Cable Connect to grounding bar Figure 16 Page 23 of 25 6 5.4.2 Grounding Kit Installation Procedure a) Prepare ground kit, as shown in Figure 17 1a. b) Clean the plastic sheath of the control cables, cutting plastic sheath with a suitable stripper tool, expose metal braid sheath of control cable, with length about 22mm, as shown in the Figure 17 1b. c) Remove the protection sheet on the ground kit, clamping the grounding kit around the control cable, and align with striped line as shown in Figure 18. d) Tighten the screws of the grounding kit, as show in Figure 19. e) Connect and tighten grounding cable on the grounding bar which locate at bottom of the tower.

**Note: The control cables should be in upright position while clamping with grounding kit. Figure 17 Figure 18 Figure 19 Transportation and Storage 6.1 Transportation Equipment can be carriage by car, train, ship, airplane or other transportation vehicles. Do prevent rain, avoid excessive vibration and impact during the transportation. Handle with care while loading and unloading, strictly prohibit drop from height and other rough handling. 6.2 Storage Packaged equipment should be placed in dry and ventilated area, ambient air without acidic, alkaline and other corrosive gas. Box stacking shall comply with specification on the box. Storage period should not exceeded two years, good stored for more than two years will need to pass re-

inspection test before use Page 24 of 25

- End of Document -

Page 25 of 25

IRCU-C414 mms PY &

Internal Remote Control Unit ==" "

ERPH: rooosaorsioswNd CE FE GA, Input: 10-30V === 1.5A row Made in China 201804 3GPP/AISG2.0 COMBA TEIECOM LTD. FOC:ID:PXBIRCU-C414e This device complies with Part 15-of the FCC Rules. Operation is subject to:the following two conditions:

(1) this device may not cause harmful interference, and (2) this-device must accept any interference received, including interference that may-cause undesired operation. IRCU-C414 ore &

Internal Remote Control Unit ERP#: 200707-000431-00 CE FE GA, Input: 10-30V === 1.5A owe Made in China 201804 3GPP/AISG2.0 COMBA TEIECOM LTD.

SGS North America Inc. 1 r 620 Old Peachtree Road Applicant Declaration SUITE 100 Suwanee, Georgia 30024 United States Contact Phone 822225788 Applicant Legal Business Name Comba Telecom Ltd. |

Aadarexs 611 East Wing, No. 8 Science Park West Avenue, Hk Hongkong, China, 510663

| Grantee Code PX8 ;

FCC ID PX8IRCU-C414 Authorized Contact Name | Ronin Gong

| Contact Email

|, the undersigned, certify that | am an authorized signatory for the Applicant and therefore declare;

a) b) g) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for:

(1) labeling the equipment with the exact FCC ID as specified in this application,

(2) compliance statement labeling pursuant to the applicable rules,

(3) compliance of the equipment with the applicable technical rules, if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCCs technical requirements. in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. in accordance with 1S017065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements.

(1) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing.

(2) the Applicant shal! make provisions to always have a production sample available upon request by SGS, FCC and/or ISED.

(3) the Applicant sha//, upon request by SGS, at the Applicant's expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. neither the Applicant nor any party to the application is subject to a denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a party for these purposes. the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc.(TCB) terms and conditions. Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-requlations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsfleng/sf01130.html Applicant Signature: Date:2020 May 19 Print Name: Ronin Gong Down brong Title:

Marketing Manager

*NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database Applicant Declaration Rev:0.0

Comba Telecom Ltd. To: SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia United States From: Comba Telecom Ltd. 611 East Wing, No. 8 Science Park West Avenue, Hk HongKong, China, 510663 Regarding: Confidentiality Request regarding application for FCC ID: PX8IRCU-C414 LONG TERM CONFIDENTIALITY Pursuant to 47 CFR Section 0.459 and 0.457 of the commissions rules, the applicant hereby request confidential treatment of the documents listed below, associated with the certification application referenced above. Schematic(s) Block Diagrams Operational Descriptions The documents above contain proprietary information not released to the public. Public disclosure of this information may prove harmful to the business of the applicant. Sincerely, Name (Printed): Marketing Manager Title: Ronin Gong Signature: Grong On behalf of Company: Comba Telecom Ltd.

Comba Telecom Ltd. Date: 2020-May-19 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: FCC ID: PX8IRCU-C414 To whom it may concern:

We, the undersigned, hereby authorize SGS-CSTC Standards Technical Services Co., Ltd. (SGS) Guangzhou branch and Kobe Jian in SGS-CSTC Standards Technical Services Co., Ltd. (SGS) Guangzhou branch to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, | acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with Comba Telecom Ltd.. This authorization is valid until further written notice from the applicant. Name (Printed): Marketing Manager Title: Ronin Gong Signature: Reowin Gren On behalf of Company: Comba Telecom Ltd.