Comba Telecom ComFlex-6900 Operation & User’s Manual

Comba Telecom Ltd. ComFlex-6900

following, to whom all enquiries should be directed in the first instance: This is an unpublished work the copyright in which vests in Comba International ("Comba"). All rights reserved. The information contained herein is confidential and the property of Comba and is supplied without liability for errors or omissions. No part may be reproduced, disclosed or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 3 0.1 CONTENTS Section Page 0.1 CONTENTS .................................................................................................................................................... 3 0.2 INDEX TO FIGURES AND TABLES ................................................................................................................... 5 0.3 HISTORY ....................................................................................................................................................... 7 0.4 GLOSSARY OF TERMS .................................................................................................................................... 8 0.5 SAFETY NOTICES AND ADMONISHMENTS ..................................................................................................... 9 1 GENERAL INFORMATION ............................................................................................................................ 10 2 EQUIPMENT DESCRIPTION .......................................................................................................................... 12 2.1 SYSTEM DIAGRAM ...................................................................................................................................... 12 2.2 TYPICAL APPLICATION ................................................................................................................................ 12 2.3 EQUIPMENT CONSTITUTION ....................................................................................................................... 13 2.4 KIT OF PART ................................................................................................................................................ 14 3 INSTALLATION ............................................................................................................................................ 16 3.1 WARNINGS AND ALERTS ............................................................................................................................. 16 3.2 SITE PLANNING CONSIDERATIONS .............................................................................................................. 17 3.2.1 SITE PLANNING ...................................................................................................................................... 17 3.2.2 SYSTEM INSTALLATION CHECKLIST ......................................................................................................... 18 3.3 INSTALLATION PROCEDURES ...................................................................................................................... 18 3.3.1 GOODS INWARDS INSPECTION............................................................................................................... 18 3.3.2 TOOLS .................................................................................................................................................... 18 3.3.3 PREPARATION ........................................................................................................................................ 18 3.3.4 MU ASSEMBLING ................................................................................................................................... 19 3.3.5 MU IN 19” RACK MOUNTING ................................................................................................................. 20 3.3.6 RU WALL MOUNTING ............................................................................................................................. 23 3.3.7 POLE MOUNT INSTALLATION ................................................................................................................. 25 3.4 EQUIPMENT CONNECTORS ......................................................................................................................... 28 3.5 EQUIPMENT CONNECTION.......................................................................................................................... 30 3.5.1 GROUNDING CONNECTION .................................................................................................................... 30 3.5.2 MU GROUNDING CONNECTION ............................................................................................................. 30 3.5.3 RU GROUNDING CONNECTION ............................................................................................................... 30 3.5.4 MU CONNECTIONS ................................................................................................................................. 31 3.5.5 RU CONNECTION .................................................................................................................................... 33 3.5.6 RU EXTERNAL ALARM CONNECTION ...................................................................................................... 35

ENU STATUS : 1-0-0 Copyright - refer to title page Page 4 3.5.7 MU BTS ALARM CONNECTION................................................................................................................ 35 3.5.8 CONNECT TO PC ..................................................................................................................................... 36 4 COMMISSIONING ....................................................................................................................................... 37 4.1 PRE-COMMISSIONING TASKS...................................................................................................................... 37 4.2 LED INDICATORS ......................................................................................................................................... 37 4.3 DIGITAL DISPLAY INDICATORS .................................................................................................................... 38 4.3.1 DIGITAL DISPLAY ON RFU ....................................................................................................................... 38 4.3.2 DIGITAL DISPLAY ON FOU....................................................................................................................... 38 5 WEB GUI ..................................................................................................................................................... 40 5.1 WEB GUI CONNECTION ............................................................................................................................... 40 5.2 WEB GUI INTRODUCTION ........................................................................................................................... 41 5.2.1 [HOME] .................................................................................................................................................. 41 5.2.2 [AUTO SETUP] ........................................................................................................................................ 45 5.2.3 [FUNCTION]............................................................................................................................................ 45 5.3 COMMISSIONING PROCEDURE ................................................................................................................... 54 6 ALARMS AND TROUBLESHOOTING ............................................................................................................. 61 6.1 ALARMS ...................................................................................................................................................... 61 6.2 TROUBLESHOOTING ................................................................................................................................... 62 7 APPENDICES ............................................................................................................................................... 64 7.1 APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE .................................................................... 64 7.2 APPENDIX B: RMA (RETURN MATERIAL AUTHORIZATION) ......................................................................... 65

ENU STATUS : 1-0-0 Copyright - refer to title page Page 5 0.2 INDEX TO FIGURES AND TABLES Figure 1: Master Unit (MU) ............................................................................................................................... 10 Figure 2: Remote Unit (RU) .............................................................................................................................. 11 Figure 3: System Diagram ................................................................................................................................ 12 Figure 4: Typical Application ............................................................................................................................. 12 Figure 5: ComFlex Master Unit ......................................................................................................................... 19 Figure 6: RF Unit Installation ............................................................................................................................ 19 Figure 7: FOU Installation ................................................................................................................................. 20 Figure 8: PSU Installation ................................................................................................................................. 20 Figure 9: Mounting Rack ................................................................................................................................... 21 Figure 10: Angle Iron Installation ...................................................................................................................... 21 Figure 11: MU Installation ................................................................................................................................. 22 Figure 12: Secure the Enclosure ...................................................................................................................... 22 Figure 13: Finish Installaiton ............................................................................................................................. 23 Figure 14: Install Mounting Rack on the Wall ................................................................................................. 24 Figure 15: Hang RU onto the Mounting Rack.................................................................................................. 24 Figure 16: Tighten the Screws at the Bottom of RU ....................................................................................... 25 Figure 17: Mounting Rack of Pole Installation ................................................................................................. 26 Figure 18: Tighten the Mounting Rack ............................................................................................................. 26 Figure 19: Hang on RU ..................................................................................................................................... 27 Figure 20: Tighten the Screws at the Bottom of RU ....................................................................................... 27 Figure 21: Finish Installation ............................................................................................................................. 28 Figure 22: MU Front Panel Connectors ........................................................................................................... 28 Figure 23: MU Rear Panel Connectors ............................................................................................................ 29 Figure 24: MU Warning Lable ........................................................................................................................... 30 Figure 25: MU Grounding (MU Rear Panel) .................................................................................................... 30 Figure 26: RU Grounding .................................................................................................................................. 31 Figure 27: Fiber Optical and RF Port Connection ........................................................................................... 32 Figure 28: MU Power Connection (Rear Panel) .............................................................................................. 32 Figure 29: MU Power Connection (Rear Panel) .............................................................................................. 33 Figure 30: Tighten Optical Fiber Connection ................................................................................................... 33 Figure 31: Power Supply Connection............................................................................................................... 34 Figure 32: RU Fiber Optical and RF Port Connection ................................................................................... 34 Figure 33: Pins Allocation for “EXT_ALM” Port of RU ................................................................................... 35 Figure 34: Pins Allocation for “BTS_ALM” Port ............................................................................................... 35 Figure 35: RFU Digital Display ......................................................................................................................... 38 Figure 36: Optical Port No. and Digital Display ............................................................................................... 38 Figure 37: PC IP Address Setting .................................................................................................................... 40 Figure 38: Input IP Address .............................................................................................................................. 40 Figure 39: Input User Name and Password .................................................................................................... 41 Figure 40: Web GUI Main Screen .................................................................................................................... 41 Figure41: [Devices] Sceen ................................................................................................................................ 42 Figure42: MU Device - Monitoring Unit ............................................................................................................ 42 Figure43: MU Device - Optical Unit .................................................................................................................. 43 Figure44: MU Device - RF Unit......................................................................................................................... 43 Figure45: RU Device ......................................................................................................................................... 44 Figure46: RU Device– 700 ................................................................................................................................ 45 Figure 47: [Auto Setup] Screen ........................................................................................................................ 45 Figure 48: Function - Device Info. .................................................................................................................... 46 Figure 49: Function - Import&Export ................................................................................................................ 46 Figure 50: Function - Summary ........................................................................................................................ 47 Figure 51: Function - Comm. Setting (SNMP) ................................................................................................. 48 Figure 52: Function - IP Setting ........................................................................................................................ 48

ENU STATUS : 1-0-0 Copyright - refer to title page Page 6 Figure 53: Function – License .......................................................................................................................... 49 Figure 54: Function - Scan ................................................................................................................................ 49 Figure 55: Function –After Scan ....................................................................................................................... 50 Figure 56: Function - Device Remove.............................................................................................................. 50 Figure 57: Function - New Site Report ............................................................................................................. 51 Figure 58: Function - PA Reset ........................................................................................................................ 51 Figure 59: Function - Device Reset .................................................................................................................. 52 Figure 60: Function - Clear History Alarm ....................................................................................................... 52 Figure 61: Function - Firmware ........................................................................................................................ 53 Figure 62: Function –Alarm Log ....................................................................................................................... 53 Figure 63: Function –WebOMT Setting ........................................................................................................... 54 Figure 64: Commissioning Procedure - Start .................................................................................................. 54 Figure 65: Commissioning Procedure - Device Scan ..................................................................................... 55 Figure 66: Commissioning Procedure - Params Setting ................................................................................ 55 Figure 67: Flow to select ................................................................................................................................... 56 Figure 68: Flow to select ................................................................................................................................... 57 Figure 69: Commissioning Procedure - Automatic Calibration ...................................................................... 58 Figure 70: Commissioning Procedure - Calibration Finish ............................................................................. 58 Figure 71: Commissioning Procedure - MU Setup.......................................................................................... 59 Figure 72: Commissioning Procedure - RU Setup .......................................................................................... 59 Table 1: MU Components ................................................................................................................................. 13 Table 2: RU Components.................................................................................................................................. 13 Table 3: Master Unit (MU) KOP ........................................................................................................................ 14 Table 4: Remote Unit (RU) KOP ...................................................................................................................... 15 Table 5: MU Connections.................................................................................................................................. 29 Table 6: Pin Definition of “BTS_ALM” Port ...................................................................................................... 35 Table 7: MU LED Indications ............................................................................................................................ 37 Table 8: RU LED Indications ............................................................................................................................ 37 Table 9: RFU Digital Display ............................................................................................................................. 38 Table 10: FOU Digital Display .......................................................................................................................... 39 Table 11: Import/Export Parameters ................................................................................................................ 47 Table 12: MU Alarm List .................................................................................................................................... 61 Table 13: RU Alarm List .................................................................................................................................... 62 Table 14: MU Alarms Diagnosis ....................................................................................................................... 62 Table 15: RU Alarms Diagnosis ....................................................................................................................... 63

ENU STATUS : 1-0-0 Copyright - refer to title page Page 7 0.3 HISTORY Change No. ENU Details Of Change 1 1-0-0 This user manual first created in February 2018.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 8 0.4 GLOSSARY OF TERMS ALC Automatic Level Control ATT Attenuation BDA Bi-direction Amplifier BS Base Station BTS Base Transceiver Station DL Downlink DT Donor Terminal FOU Fiber Optical Unit GUI Graphic User Interface ID Identification LNA Low Noise Amplifier MCU Main Control Unit MT Mobile Terminal MTBF Mean Time Between Failures MU Master Unit NC Normally Closed NF Noise Figure NO Normally Open OMC Operation & Maintenance Center OMT Operation & Maintenance Terminal OP Optical Fiber OPEX OperatingExpense PA Power Amplifier PIM Passive Inter Modulation PLL Phase Locked Loop POI Point of Interconnects PSU Power Supply Unit RF Radio Frequency RFU Radio Frequency Unit RU Remote Unit SMA Sub-Miniature “A” Connector TX/RX Transmit/Receive UL Uplink VAC Volts Alternating Current VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access

ENU STATUS : 1-0-0 Copyright - refer to title page Page 9 0.5 SAFETY NOTICES AND ADMONISHMENTS This document contains safety notices in accordance with appropriate standards. In the interests of conformity with the territory standards for the country concerned, the equivalent territorial admonishments are also shown. Any installation, adjustment, maintenance and repair of the equipment must only be carried out by trained, authorized personnel. At all times, personnel must comply with any safety notices and instructions. Specific hazards are indicated by symbol labels on or near the affected parts of the equipment. The labels conform to international standards, are triangular in shape, and are coloured black on a yellow background. An informative text label may accompany the symbol label. Hazard labeling is supplemented by safety notices in the appropriate equipment manual. These notices contain additional information on the nature of the hazard and may also specify precautions. CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the product. NOTE: Note: The grantee is not responsible for any changes or modifications not expressly approved by the party responsible for compliance. Such modifications could void the user’s authority to operate the equipment. To comply with FCC RF exposure compliance requirements, each individual antenna used for this transmitter must be installed to provide a separation distance greater than 2.3763 meter or more from all persons during normal operation and must not be co-located with any other antenna for meeting RF exposure requirements. WARNING! This is NOT a CONSUMER device. It is designed for installation by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST have and FCC LICENSE or express consent of an FCC License to operate this device. Unauthorized use may result in signification forfeiture penalties, including penalties in excess of $100,000 for each continuing violation. NOTE: A readily accessible disconnect device shall be incorporated external to the equipment. WARNING! Use only authorized and approved antennas, cables and/or coupling devices! The use of unapproved antennas, cables or coupling devices could cause damage and may be of violation of FCC regulations. The use of unapproved antennas, cables and/or coupling devices is illegal under FCC regulations and may subject the user to fines.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 10 1 GENERAL INFORMATION The ComFlex-6900 Distributed Antenna System (hereinafter called “ComFlex”) consists of Master Unit (MU) and Remote Unit (RU). The MU includes the MU Chassis, Power Supply Unit (PSU), Fiber Optical Unit (FOU) and RF Unit (RFU). With a modular design, it can support up to 8 independent RF inputs and 8 Remote Units. The Remote Unit is a module design which supports 4 independent bands, 2300MHz, 2300MIMO, 2500MHz and 2500MIMO band. The low signal transmission loss of optical fiber is applicable for long distance transmission. ComFlex can support the optical transmission of up to 6.5dBo optical loss, equivalent to 8 miles fiber length. Main feature:  Modularized Master Unit supports flexible field upgrade and maintenance.  Independent gain control for each RF source.  High MTBF and low noise design with modular PSU and convection cooling.  RF module supports both simplex and duplex.  Supports multi-operator and mix mode application.  Optical link auto gain control.  Web based GUI for intelligent commissioning and configuration. The figures below show the ComFlex Master and Remote unit enclosure. Figure 1: Master Unit (MU)

ENU STATUS : 1-0-0 Copyright - refer to title page Page 11 Figure 2: Remote Unit (RU) End of Section

ENU STATUS : 1-0-0 Copyright - refer to title page Page 12 2 EQUIPMENT DESCRIPTION 2.1 SYSTEM DIAGRAM Figure 3: System Diagram On the DL, signals from the BTSs or BDA are converted into optical signals after amplification in the MU.Then the optical signals are transmitted to the RU via optical fiber. The Optical TX/RX Module of RU converts the DL optical signals into RF signals. After amplification, the signals are transmitted from RU ANT port to the service antenna using 50Ohm coaxial cable. On the UL, the signals transmitted by the mobile are converted into optical signals, and then via the UL optical fiber, the signals are transmitted to MU, which then converts the optical signals back to RF signals and send to BTS or BDA via 50Ohm coaxial cable. 2.2 TYPICAL APPLICATION Shown below are the typical SISO and MIMO applications of MU and RUs. ANT ANT ANT ANT 2300MHz 2500MHz MIMO MIMO MIMO MIMO MIMO MIMO Figure 4: Typical Application Optical Fiber MU Distributed Antenna System RU MIMO Optical Fiber MIMO Antenna System

ENU STATUS : 1-0-0 Copyright - refer to title page Page 13 2.3 EQUIPMENT CONSTITUTION MU consists of the following parts: Table 1: MU Components Module Description MU01-RACK Master Unit Chassis includes eight slots for RF Unit, two slots for Fiber Optical Unit, and one slot for Power Supply Unit. MU01-PSU iDAS Master Unit Power Supply Unit (PSU) converts the input voltage into stable DC to supply power for other modules of Master Unit. MU01-FOU Master Unit Fiber Optical Unit (FOU) completes optical signal and RF signal conversion. One FOU has four optical ports, which means each FOU can support up to four RUs. MU01-RFU Master Unit RF Unit completes separation and combination of uplink and downlink signal with independent gain control, supports either simplex or duplex. RU consists of the following parts: Table 2: RU Components Module Description HRU01-6900 Remote Unit; A module design which supports 4 bands, including 2300MHz, 2300MIMO, 2500MHz, 2500MIMO.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 14 2.4 KIT OF PART Table 3: Master Unit (MU) KOP Item Qty Image MU Chassis 1 RF Unit (RFU) 1~8 Fiber Optical Unit (FOU) 1~2 Optical Extention Unit 1 Power Supply Unit (PSU) 1 Power Supply Cable (13 Feet 1 inch) 1 Communication Cable 1 Right Angle Bracket (for MU 19“rack mounting) 1 Left Angle Bracket (for MU 19“ rack mounting) 1

ENU STATUS : 1-0-0 Copyright - refer to title page Page 15 Table 4: Remote Unit (RU) KOP Item Qty Image Remote Unit 1 Mounting Bracket (used for both pole and wall installations) 1 Nuts M8, Spring Washers Φ8, Plain Washers Φ8 (used for securing Remote Unit when hanged on bracket protrusions) 2 pieces each Masonry Bolt (set) M10x110 – used for wall mount installations 6 Hose Clamp (Φ30-Φ125) - used for pole mount installations (2 per bracket) 5 OptiTap Optical Fiber 1 Power Supply Cable (AC) 1 Copper Grounding Wire (2m) 1 RJ45 Ethernet Communication Cable 1 Key – used for opening unit panels for access to internal components. 1 End of Section

ENU STATUS : 1-0-0 Copyright - refer to title page Page 16 3 INSTALLATION 3.1 WARNINGS AND ALERTS Laser Laser light can cause damage to eyes. Laser light is not visible. Viewing it directly does not cause pain. The iris of the eye will not close when viewing a bright light. Consequently, serious damage to the retina of the eye is possible. NEVER LOOK INTO THE END OF A FIBER WHICH MAY HAVE A LASER COUPLED TO IT. Radio Frequency Energies There may be situations, particularly for workplace environments near high-powered RF sources, where recommended limits for safe exposure of human beings to RF energy could be exceeded. In such cases, restrictive measures or actions may be necessary to ensure the safe use of RF energy. High Voltage The equipment has been designed and constructed to prevent practicable danger, as far as reasonably possible. Any work activity on or near equipment involving installation, operation or maintenance must be free from danger, as far as reasonably possible. Where there is a risk of damage to electrical systems involving adverse weather, extreme temperatures, wet, corrosive or dirty conditions, flammable or explosive atmospheres, the system must be suitably installed to prevent danger. Protective Earthing Equipment provided for the purpose of protecting individuals from electrical risk must be suitable for the purpose and properly maintained and used. Handling Precautions This covers a range of activities including lifting, lowering, pushing, pulling, carrying, moving, holding or restraining an object or person. It also covers activities that require the use of force or effort, such as pulling a lever, or operating power tools. Electrostatic Discharge (ESD) Observe standard precautions for handling ESD-sensitive devices. Assume that all solid-state electronic devices are ESD-sensitive. Ensure the use of a grounded wrist strap or equivalent while working with ESD-sensitive devices. Transport, store, and handle ESD-sensitive devices in static-safe environments.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 17 3.2 SITE PLANNING CONSIDERATIONS 3.2.1 SITE PLANNING Site Considerations The MU is designed to be located indoors to facilitate coupling of BTS signals and power supply connections. The input range of MU RF unit is 10~30 dBm. The site consideration for RU is listed below:  The distance between the service antenna of RU and coverage area should satisfy line of sight requirements for maximum coverage area.  The maximum fiber length is 8 miles, with a maximum path loss of 6.5dBo.  The system delay of the optical system must be taken into consideration when there are neighboring BTS sites overlapping in coverage. Installation Location Mounting surface shall be capable of supporting the weight of the equipment. In order to avoid electromagnetic interference, a proper mounting location must be selected to minimize interference from electromagnetic sources such as large electrical equipment. Environmental Humidity has an adverse effect on the reliability of the equipment. It is recommended to install the equipment in locations having stable temperature and unrestricted air-flow. The installation location for the system should be well ventilated. The equipment has been designed to operate at the temperature range and humidity level as stated in the product specifications. Powering The power supply unit (PSU) provides power to all modules within the equipment. Depending on the product variant, it is recommended that the PSU operates on a dedicated AC circuit breaker or fused circuit. Grounding Requirement Verify that the equipment has been well grounded. This includes antennas and all cables connected to the system. Ensure lightning protection for the antennas is properly grounded. Cable Routing Depending on equipment configuration, a variety of types of cables are connected to the MU and RU: coaxial cables, optical fibers, power cable, communication cable, and commissioning cable. Where applicable, ensure cables are properly routed and secured so that they are not damaged. Manual Handling

ENU STATUS : 1-0-0 Copyright - refer to title page Page 18 During transportation and installation, take necessary handling precautions to avoid potential physical injury to the installation personnel and the equipment. 3.2.2 SYSTEM INSTALLATION CHECKLIST  Working space available for installation and maintenance for each mounting arrangement. Ensure unrestricted airflow.  Ensure earthing point is within reach of the ground wire. (2m; 6 ft. 10 in.).  Ensure a power source is within reach of the power cord and the power source has sufficient capacity.  Where appropriate, ensure unused RF connectors are terminated.  Where appropriate, ensure unused optical fiber connectors are protected.  Do not locate the equipment near large transformers or motors that may cause electromagnetic interference.  Reduce signal loss in feeder cable by minimizing the length and number of RF connections.  Ensure the equipment will be operated within the stated environment (refer to datasheet).  Where needed, couple BTS RF signal with a coupler to prevent damaging the equipment.  Where appropriate, confirm available of suitably terminated grade of RF and optical fiber.  Observe handling of all cables to prevent damage. 3.3 INSTALLATION PROCEDURES 3.3.1 GOODS INWARDS INSPECTION ComFlex was factory tested, inspected, packed, and delivered to the carrier with utmost care. Do not accept shipment from carrier which shows damage or shortage until the carrier’s agent endorses a statement of the irregularity on the face of the carrier’s receipt. Without documentary evidence, a claim cannot be processed. Open and check each package against the packing list. For any shortage, contact Comba Telecom Systems. Do not remove items from packing materials until installation. 3.3.2 TOOLS See Appendix A for a full list of tools required for installation and maintenance. 3.3.3 PREPARATION Optical Fiber:  Fiber optic cables require proper handling. Do not stretch, puncture, or crush the fiber cable(s) with staples, heavy equipment, doors, etc.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 19  Always maintain the minimum bending radius specified by the cable manufacturer. The minimum bend radius is usually 10 times the cable’s outer diameter. In the case of single optical fiber that is not in a cable, the minimum bending radius to be observed is 3cm. (1.2”) . 3.3.4 MU ASSEMBLING ComFlex Master Unit consists of 4 parts: Chassis, RFU, FOU and PSU. All the units are packed separately. Follow the steps below to assemble. Figure 5: ComFlex Master Unit Step1: RF Unit installation: Remove RFU slot cover plate on Chassis, insert RFU and fasten the screws. (Each Unit can be installed in any one of eight RFU slots) Figure 6: RF Unit Installation Step2: FOU installation: Remove FOU slot cover plate on Chassis, insert FOU and fasten the screws. (Each Unit can be installed in either one of two FOU slots)

ENU STATUS : 1-0-0 Copyright - refer to title page Page 20 Figure 7: FOU Installation Step3: PSU installation: Remove PSU slot cover plate on the right side of Chassis, insert PSU and fasten the screws. Figure 8: PSU Installation 3.3.5 MU IN 19” RACK MOUNTING MU is an indoor type device; the installation procedures are shown as below: Step 1: Install right angle bracket and left angle bracket on back of the mounting rack. (Rack nuts and screws are not provided.) Use rack nuts and screws as recommended by rack manufacturer.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 21 Figure 9: Mounting Rack Figure 10: Angle Iron Installation

ENU STATUS : 1-0-0 Copyright - refer to title page Page 22 Step2: Slide the MU on to the angle brackets and confirm it is level. Figure 11: MU Installation Step 3: Attach the MU onto the rack with the recommended rack screws. Figure 12: Secure the Enclosure

ENU STATUS : 1-0-0 Copyright - refer to title page Page 23 Step 4: Finish installation. Figure 13: Finish Installaiton 3.3.6 RU WALL MOUNTING RU wall mounting steps are shown below. Step 1: Select the wall mount location according to the following criteria:  General surroundings  Ventilated and easy-to-reach area (for maintenance and on-site inspection)  Proximity to DAS antenna in order to minimize cable loss Step 2: Using the mounting bracket top and bottom mounting holes as a guide  Measure and mark the location for drilling the (supplied) M10 Masonry bolts (Φ12) in the wall (6 per bracket and drill the holes).  Using an electric drill with a Φ12 head, drill the holes for the Masonry Bolts. NOTE: The ComFlex remote unit is mounted vertically with the connectors facing downwards.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 24 Step 3: Using 6 (M10x110) Masonry bolts per bracket – secure the Mounting Brackets to the wall with the protruding M8 nuts facing towards you. The remote unit will be hung on these. Figure 14: Install Mounting Rack on the Wall Step 4: Connectors facing down carefully fit and hang the GX unit on to the M10 bolts protruding from the top, middle and bottom parts of the mounting bracket. Figure 15: Hang RU onto the Mounting Rack

ENU STATUS : 1-0-0 Copyright - refer to title page Page 25 Step 5: Using a spanner or wrench, tighten the two (2) M8 nuts on the top and bottom of the mounting bracket as shown below. Figure 16: Tighten the Screws at the Bottom of RU Step 6: Check enclosure position and verify that unit is mounted securely to the wall. . 3.3.7 Pole Mount Installation Step 1: Select the appropriate location according to the following criteria:  Accessibility  Antenna location and distance  Proximity to the antenna in order to minimize cable loss

ENU STATUS : 1-0-0 Copyright - refer to title page Page 26 Step 2: Secure the mounting bracket by slipping the 5 hose clamps (provided) through the mounting bracket and tighten securely. Figure 17: Mounting Rack of Pole Installation Figure 18: Tighten the Mounting Rack

ENU STATUS : 1-0-0 Copyright - refer to title page Page 27 Step 3: Connectors facing downwards hook the GX-Quad on to the top part of the bracket and then to the bottom. Figure 19: Hang on RU Step 4: Using a spanner or wrench, tighten the two (2) M8 nuts on the top and bottom of the mounting bracket as shown below. Figure 20: Tighten the Screws at the Bottom of RU

ENU STATUS : 1-0-0 Copyright - refer to title page Page 28 Figure 21: Finish Installation 3.4 EQUIPMENT CONNECTORS The figures below present the connectors of ComFlex MU. 1 2 3 4 5 6 7 8 Figure 22: MU Front Panel Connectors

ENU STATUS : 1-0-0 Copyright - refer to title page Page 29 9 10 11 12 13 14 Figure 23: MU Rear Panel Connectors Table 5: MU Connections Identifier Functional Description 1. OP1~OP4 SC/APC optical fiber access port 2. LED indicator LED indicator. See Chapter 4 for the description of each indicator. 3. BTS_ALM DB9-F connector for BTS alarm. 4. OMT RJ45 connector connects PC with equipment for local and remote monitoring. 5. LAN Reserved RJ45 port for remote monitoring. 6. TX/RX RF access port, Mini Din connector. 7. RX RF access port, Mini Din connector. 8. Digital display tube. See chapter 4 for the detailed description. 9. Grounding connector. 10. FOU Communication port with extension optical unit. 11. AUX Reserved interface for source calibration unit. 12. 28 GND Provide 28V power supply for extension units (FOU and source calibration unit). 13. UL1,DL1; UL2,DL2; UL3,DL3 Reserved for RF interface of extended FOU and single soure calibration unit. 14. AC100~240V AC power supply connector.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 30 3.5 EQUIPMENT CONNECTION 3.5.1 GROUNDING CONNECTION Figure 24: MU Warning Lable 3.5.2 MU GROUNDING CONNECTION Step 1: Connect the GND cable to the GND connector and the building EARTH. Recommended GND cable size is # 12 AWG. Step 2: Ensure the GND cable is connected to building GND. Grounding Connector Figure 25: MU Grounding (MU Rear Panel) 3.5.3 RU GROUNDING CONNECTION Step 1: Connect one side of the supplied copper wire GND cable to right side of RU with two M6×10 hexagon Screws (screws are provided). Connect the other side of the supplied copper wire GND cable to the building EARTH with two M6 screws (screws are not provided). Step 2: Connect one side of the supplied copper wire GND cable to RU with two M6×10 hexagon Screws (screws are provided). Connect the other side of the supplied copper wire GND cable to the building EARTH with two M6 screws (screws are not provided). Step 3: Ensure all GND cables are well grounded to building GND. WARNING! This unit must always be grounded. Consult an appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Do not connect power before grounding.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 31 Figure 26: RU Grounding 3.5.4 MU CONNECTIONS Step1: Connect the MU OP (optical) port to one of the RU OP port. (NOTE: requires Single Mode fiber with SC/APC connectors; MAXIMUM OPTICAL LOSS = 6.5dBo) Step 2: For duplex application, connect the MU RFU TX/RX port to the RF Source (BTS or BDA). For simplex application, connect the MU RFU TX/RX port to the RF Source downlink, and then connect MU RFU RX port with RF Source uplink. (NOTE: RF cable must be mini-DIN Male on the MU side)

ENU STATUS : 1-0-0 Copyright - refer to title page Page 32 Local commissioning & Remote monitoring port BTS Alarm Reserved Fiber optic port RF port, to BTS LED indicator Figure 27: Fiber Optical and RF Port Connection Step 3: Connect the power cable to the power supply port (100-240VAC, 1Amp maximum). Power Connection Figure 28: MU Power Connection (Rear Panel)

ENU STATUS : 1-0-0 Copyright - refer to title page Page 33 3.5.5 RU CONNECTION Step 1: Connect the OptiTap optical fiber to RU OP (optic) port and one of the OP port located on MU FOU front panel. Figure 29: MU Power Connection (Rear Panel) Step 2: Rotation outer shell to tighten the fiber conncetion. Figure 30: Tighten Optical Fiber Connection Step 3: Connect ANT port to a broadband antenna using 50Ohm coaxial cabel.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 34 Step 4: Connect power cable on PSU with the public power grid (110~220VAC, 14Amp maximum). Figure 31: Power Supply Connection Figure 32: RU Fiber Optical and RF Port Connection MU Port

ENU STATUS : 1-0-0 Copyright - refer to title page Page 35 3.5.6 RU EXTERNAL ALARM CONNECTION For RU external alarm, there is an 8-pin waterproof connector. The following figure and table show the pin allocation and definition. Pin numbering are shown looking-into the connector on the enclosure. Figure 33: Pins Allocation for “EXT_ALM” Port of RU 3.5.7 MU BTS ALARM CONNECTION The equipment alarms can be signaled to the BTS via voltage-free relay contacts. The voltage-free relay connections are connected to the DB-9 port “BTS_ALAM” located on the MU. The following figure and table show the pin allocation and definition. 1 2 4 3 5 6 7 9 8 BTS_OPEN BTS_CLOSE BTS_ COM Figure 34: Pins Allocation for “BTS_ALM” Port Table 6: Pin Definition of “BTS_ALM” Port Pin Number Definition Description 1 BTS_OPEN Connects to the open terminal of the voltage free relay. 2 BTS_COM Connects to the common terminal of the voltage free relay. 3 BTS_CLOSE Connects to the close terminal of the voltage free relay. 4 ~ 9 NC Reserved.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 36 3.5.8 CONNECT TO PC The local commissioning and management for MU and RU is achieved through connecting to the WEB base GUI. Connect MU to PC Connect MU “OMT” port (RJ45) to the RJ45 port of PC with supplied Ethernet cable to achieve local monitoring and management. End of Section

ENU STATUS : 1-0-0 Copyright - refer to title page Page 37 4 COMMISSIONING 4.1 PRE-COMMISSIONING TASKS After equipment installation, perform the following steps before equipment powering and commissioning, check that the expected voltage, current, and power levels do not violate any ratings. Double check all connections including ground before applying power. Do not manipulate circuits or make changes when power is applied:  Visually inspect the power connection within the equipment. Ensure that all cables are correctly and securely connected, including power cables, grounding wires, RF cables and optical cables.  Check grounding connection and verify that the ground resistance is less than 5Ω.  Connect the equipment to the PC.  Power on MU and RU.  Monitor the initialization of the MU and RU though the LEDs on the panel. Refer to detailed LEDs information in the next section. 4.2 LED INDICATORS Diagnostic LEDs are located on the MU front panel and RU bottorm panel; each indicates the status of a particular function: Table 7: MU LED Indications LED Indicator Normal Status Indication PWR Steady green Power indicator. If LED is off, it indicates the system has no power. RUN Flashing green (1 time/sec) MU operation indicator. After initialization (1~2 minutes), the LED should flash at once per sec. (When upgrade firmware, LED will flash rapidly) ALM OFF Alarm indicator. If LED is RED, there is an alarm. OP Steady green Located on Fiber Optical Unit (FOU), it is an indicator for receive optical power. If LED is off, it indicates the receiving optical power is less than -10dBm. Table 8: RU LED Indications LED Indicator Normal Status Indication COMM. Blinking green (1 time/sec) BLINKING GREEN - Flashes (rate of flash per second) for the duration of 1 minute upon communication initialization RAPID/NO FLASH - Indicates communication fault RUN Off OFF – Normal operation RED - Fault ALM Off Alarm indicator. If LED is RED, there is an alarm. LED Indicator Normal Status Indication

ENU STATUS : 1-0-0 Copyright - refer to title page Page 38 4.3 DIGITAL DISPLAY INDICATORS 4.3.1 DIGITAL DISPLAY ON RFU The digital display tube on RFU shows the DL input power. The range of DL input power shown on the display tube is from -19 to 33 (dBm), when DL input power is lower than -19dBm, it will show L, when DL input power is higher than 33, it will display H. Figure 35: RFU Digital Display Table 9: RFU Digital Display Figure DL Input Power Level L < -19dBm -19~33 -19~33dBm H > 33dBm 4.3.2 DIGITAL DISPLAY ON FOU The digital display tube on optical module has two digits. The first digit will display A, b, C and d which presents the No. of optical port. Refer to below figure for the relationship. The second digit will display the optical loss of each port. See the following table for the relationship of figure and optical loss. A b C d Figure 36: Optical Port No. and Digital Display

ENU STATUS : 1-0-0 Copyright - refer to title page Page 39 Table 10: FOU Digital Display Figure Optical Loss 0~9 0~9dBo H > 9dBo End of Section

Copyright - refer to title page Page 40 5 WEB GUI ComFlex can be monitored and controlled by WEB GUI, follow below contents to achive system parameter setting and commissioning. 5.1 WEB GUI CONNECTION Step 1: Connect MU OMT port to PC RJ45 port with the supplied Ethernet cable to set up a physical connection. Step 2: Go to laptop Control Panel\Network and Internet\Local Area Connection. Right click it and click Properties. Then follow the steps shown in figure below. Figure 37: PC IP Address Setting Step 3: Open browser (browser IE7.0, IE8.0, Chrome or Firefox, suggest disply resolution is 1024×768), input Web GUI IP address: 192.168.8.101, click [Enter]. Figure 38: Input IP Address Step 2: Input User Name: admin; Password (default password: admin). Click [Log in].

ENU STATUS : 1-0-0 Copyright - refer to title page Page 41 Figure 39: Input User Name and Password 5.2 WEB GUI INTRODUCTION After login, the Web GUI main screen will appear. Figure 40: Web GUI Main Screen On Comba Web GUI Home page, there are four Menu bars: [Home], [Auto Setup], [Functions]. 5.2.1 [HOME] The [Home] page shows the actual connection diagram of MU and RU.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 42 Figure41: [Devices] Sceen MU Main Management Screen Figure42: MU Device - Monitoring Unit Optical Unit Management Screen Click here for RU main management page. Click here for MU main management page. Click here for FOU main management page. Click here for RFU main management page. Link FOU port number This part shows MU alarm status. Click here to enable/disable alarm information.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 43 Figure43: MU Device - Optical Unit Note: MU transmit optical power is -4~-2dBm. RF Unit Management Screen Figure44: MU Device - RF Unit Remote Unit Management Screen Click RU photo, users can visit RU directly. Make sure two steps are done before visit RU:  RU and MU are connected by optical fiber. Slot number RF parameter Commissioning status Downlink input power overdrive alarm Click here to ON/OFF RF switch and modify attenuator This part shows MU alarm status. Optical loss between MU to RU.The value is over 15dB when MU to Ru are not connected well. Optical power alarm.The indicators whill be red if the received optical power is less than -10dBm. This switch for HRU01-6900 is OFF. Band and Remark information

ENU STATUS : 1-0-0 Copyright - refer to title page Page 44  RU device scanning is done. Note: Go to [Commissioning] page or [Management] page for device scanning. Figure45: RU Device NOTE: There are three statuses for PA Service: Normal, Recovery and Shutdown. If PA output power or reflected power exceeds the threshold (32dBm for LRU, 39dBm for MRU), software will trigger Recovery:  It will reset PA and then re-detect the PA output power and reflected power, if they are normal, the PA Service Status will turn to Normal, if PA output power or reflected power is still over the threshold, PA Service Status will turn to Recovery again.  If PA output power or reflected power is still over the threshold after six times of PA Recovery, PA Service status will be Shutdown which will need to be reset manually.Reset at Management > PA Reset. Click on a specific band on the left side of RU Device page, the corresponding band information will show. Select band to check relative and information. Band information table RU common information table

ENU STATUS : 1-0-0 Copyright - refer to title page Page 45 Figure46: RU Device– 700 5.2.2 [AUTO SETUP] A work flow of the commissioning process is shown on [Auto Setup] page. Click the [Start] button, the software will guide you through the commissioning step by step. For details, please refer to chapter 5.3. Figure 47: [Auto Setup] Screen 5.2.3 [FUNCTION] Other parameters can be configured on [Function] page. RF parameter setting table Alarm information and configuration table.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 46 There are fifteen function bars list in the left side of the [Mangement] page. Below figures are the introduction of each function bar.  Devic Info. Figure 48: Function - Device Info. Note: Users can input maximum 30 bytes characters in Device Info.  Import&Export Figure 49: Function - Import&Export Select device select a device, the device information will show Parameter configurations can be input and output in this page

ENU STATUS : 1-0-0 Copyright - refer to title page Page 47 Below table list the parameters that can be import/export: Table 11: Import/Export Parameters Device Paremeter Device Parameter MU Alarm Enable RU Alarm Enable ATT value ATT value RF Switch RF Switch SNMP parameter Over temperature alarm threshold DL over output power threshold External Alarm level Import and Export can help users quickly configure MU and RU parameters. For example, if one MU/RU finished configuration, users can export its parameters and save as a file in PC, and then import this file to other MU/RU to fast finish the MU/RU parameter setting.  Summary Figure 50: Function - Summary Step1：select a device Step2：Click Create key

ENU STATUS : 1-0-0 Copyright - refer to title page Page 48  Comm. Setting Figure 51: Function - Comm. Setting (SNMP)  IP Setting Figure 52: Function - IP Setting Note: For remote monitoring, the IP Address must be set correctly according to the location IP of remote connection. If there is more than one equipment is connected to the public network through the same router, the router’s local IP CANNOT be set as 192.168.8.*.  License Choose a way Configure MU IP address for remote monitoring of MU

ENU STATUS : 1-0-0 Copyright - refer to title page Page 49 Figure 53: Function – License  Scan Figure 54: Function - Scan Step1：select a device. Step2：enter the license code. Step3：click set. Click scan.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 50 Figure 55: Function –After Scan  Device Remove Figure 56: Function - Device Remove Note: If the RU has been scanned and identified by MU, to remove the RU from the system,users must remove this RU on this [Remove] page, otherwise, RU will still be shown on the Home page and will trigger optical alarm.  New Site Report Step1：select a device. Step2：click Remove key.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 51 Figure 57: Function - New Site Report  PA Reset Figure 58: Function - PA Reset Note:PA will be turned off by software when PA output power or (VSWR) reflected power is exceed the threshold. Users need to reset PA after debugging.  Device Reset Step1：select a device. Step2：click to Report . Step1：select a device. Step2：select PA of the corresponding frequency band resets.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 52 Figure 59: Function - Device Reset Note: Device Resetprocess will last about 2~4 minutes. For MU monitor reset, users need to re-login WEB GUI.  Clear History Alarm Figure 60: Function - Clear History Alarm  Firmware There are three functions on the [Firmware] bar: [Monitoring Upgrade], [Swap] and [Module Upgrade]. [Monitoring Upgrade] is used to upgrade software. [Swap] is to replace current firmware version to the previous one. [Module Upgrade] is used to upgrade module software. Step1：select a device. Step2：click Reset key. Step1：select a device. Step2：clear all histoty alarms.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 53 Figure 61: Function - Firmware  Alarm Log Figure 62: Function –Alarm Log  WebOMT Setting Step1：select a device. Step2：click to select software that to be updated. Step3：click to upgrade software. Step1：select a device. Query device alarm log. Export device alarm log.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 54 Figure 63: Function –WebOMT Setting 5.3 COMMISSIONING PROCEDURE To complete the installation and commissioning, users need to follow the steps below. Step 1: Click Menu bar [Auto Setup] on home page, a work flow will show up. Figure 64: Commissioning Procedure - Start Step 2: Click to start RU device scan, this step will take about 1 minute.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 55 Figure 65: Commissioning Procedure - Device Scan Step 3: Click to enter to Params Setting page. Click , users can set the device information and system time. Figure 66: Commissioning Procedure - Params Setting Dev Info mainly used to record device location and Date/Time provid a time reference. Mouse clicks the Config Value of Date/Time to auto receive the computer time. Step 4: Click to enter to the page to select folw to continue. There are three flows to select: Calibration, Setup and Finish.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 56 Figure 67: Flow to select Note: Calibration is to adjust MU and RU gain to make sure system gain is normal, if the band have been calibrated, users can click to skip the process; if the band never been calibrated, users click in the step of Calibration, software can still procede to the next step of MU and RU setup, but the system gain will be a little deviation with normal valuer, so the final output power will be not same with the target DL output power. NOTE: Make sure all the ANT ports of RUs are connected with dummy load or antenna system before proceeding to step 5. Step 5: Select Calibration and click to enter to Calibratiion page after finishing Parems Setting.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 57 Figure 68: Flow to select  Automatic calibration no needs to select frequency band, the system will calibration all the band automatically.  If users choose Manual calibration, then go to next page to select frequency band to calibrate. Note: Make sure the ANT port of RU is connected with dummy load or antennas before Calibration. Several RU can be calibrated simultaneously.  Automatic calibration Select “Automatic Calibration”, and click OK to goto calibration process. The process will last 1-5 minites according to the MU and RU quantities and band quantity.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 58 Figure 69: Commissioning Procedure - Automatic Calibration After calibration, the status of calibration will change “Success” from ”Not Done”, the colour change from yellow to green at the same time. Finishing calibration, then user can go to setup flow. Figure 70: Commissioning Procedure - Calibration Finish Step 6: Click to enter to MU Setup page after finishing Calibration.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 59 Figure 71: Commissioning Procedure - MU Setup Step 7: Click to enter to RU Setup page after finishing MU setup. Figure 72: Commissioning Procedure - RU Setup Two parameters need to be set in this step.  RF Switch: Set the RF switch status of Remote Unit.  Target DL Output Power: Expected DL output power setting. Note: Rated output power of ComFlex

ENU STATUS : 1-0-0 Copyright - refer to title page Page 60 Step 8: Click to enter to [Finish] page after finishing RU setup. Note: As the system calibration process is calibrated for single channel, so if there is more than one same band input, because of the power superposition, the band total output power will higer than target DL output power after the calibration is complete. The calibration work is mainly to set device to reach it’s theoretical gain, so when there are two or more same bands access into and they have the same input power level, each channel will reach it’s rated power, so the total output power will be (input A+gain) + (inputB+gain)+…+(inputN+gain). For example, if there are two 1900MHz bands acess to MU, each has 10dBm input power, the total output power of RU 1900MHz will be 30dBm+30dBm=33dBm. Refer to the method below for the gain adjustment: Suppose a band with N independent inputs, each input signal power are all X dBm. Apparently, there exists the following relationship between input and output after finished auto communication on WEB GUI: X dBm + Gain = 30dBm, then the total output power for N channels access is X dBm + Gain + 10*Log(N) = 30 + 10*Log(N), so Users need to set 10*Log(N) RFU ATT on WEB GUI for each channel. End of Section

ENU STATUS : 1-0-0 Copyright - refer to title page Page 61 6 ALARMS AND TROUBLESHOOTING 6.1 ALARMS Table 12: MU Alarm List Alarm List Alarm Condition Over-Temperature Alarm  Alarm when equipment temperature is higher than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold : 80℃ by default. Optical Tx Alarm  Alarm when Optical Transmiting power is lower than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold: -7dBm by default. Optical Rx Alarm  Alarm when Optical received power is lower than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold: -10dBm by default. DL Input Power Overload Alarm  Alarm when DL input power is higher than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold: 32dBm by default.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 62 Table 13: RU Alarm List Alarm List Alarm Condition External Alarm  Alarm status when the external terminals have the same H/L level with alarm level, otherwise normal;  Alarm period: 10s by default. Over-Temperature Alarm  Alarm when equipment temperature is higher than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold : 80℃ by default. Optical Tx Alarm  Alarm When optical transmiting power is lower than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold: 0dBm by default. Optical Rx Alarm  Alarm When optical receiving power is lower than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold: -14dBm by default. PA Alarm  Alarm when any one of the PA Current Alarm,PA Over-temperature Alarm, PA DL output power overload Alarm, Reflection Power Alarm happens, otherwise normal;  Alarm judgment period: 3 minutes by default. DL Output Overload Alarm  Alarm when the DL output power is higher than the threshold, otherwise normal;  Alarm judgment period: 3 minutes by default;  Alarm threshold: 48dBm. Shutdown Alarm  Alarm when the PA status is off, otherwise normal;  Alarm judgment period: 10s by default. LNA Alarm  Alarm when LNA have problems, otherwise normal;  Alarm judgment period: 3 minutes by default. 6.2 TROUBLESHOOTING Following installation and commissioning, occasional operation tasks to handle alarms may be required: Table 14: MU Alarms Diagnosis Alarm condition Diagnosis Over- Temperature alarm  Check device temperature on WEB GUI  If device temperature is over threshold, make sure environment temperature is within the envireonment temperature range that MU supported (0~40℃). Apply climatic protection to the system under severe environment. Optical TX Alarm  Test MU transmit optical power  Replace FOU if transmit optical power is less than -7dBm Optical RX Alarm  Use Optical Power Meter to test received optical power  If received optical power is lower than -10dBm, test whether RU transmit optical power is normal (3~5dBm)  Check if optical loss of fiber link is higher than 6.5dBo  Clean fiber connector with absolute ethanol DL Input Power Overload Alarm Test DL input power of MU, if it is higher than +33dBm, choose proper coupler to ensure the input power to MU is lower than +33dBm.

ENU STATUS : 1-0-0 Copyright - refer to title page Page 63 Table 15: RU Alarms Diagnosis Alarm condition Diagnosis External Alarm Check to make sure if the external device connected is working normally Over- Temperature alarm  Check device temperature on WEB GUI  If device temperature e is over threshold, make sure environment temperature is within the envireonment temperature range that RU supported (- 40~70℃).Apply climatic protection to the system under severe environment. Optical TX Alarm  Test RU transmit optical power  Replace FOU if transit optical power is less than 0dBm Optical RX Alarm  Use Optical Power Meter to test received optical power  If received optical power is lower than -14dBm, test whether MU transmit optical power is normal (-4~-2dBm)  Check if optical loss of fiber link is higher than 6.5dBo  Clean fiber connector with absolute ethanol DL PA alarms Check PA Service Status on WEB GUI RU page,  If it is [Recovery], reset PA on WEB GUI Management page, then read RU output power: If output power is exceed threshold, need to reduce gain or input power; if output power is normall, check whether antenna port VSWR is too high.  If it is [Shutdown], Refer to PA Shutdown Alram DL Output Power Overload Alarm  Check if output power is exceed the threshold (48dBm)  Decrease the gain to reduce the output power PA Shutdown Alarm  Make Sure the environment temperature is -40~70℃  Reset PA, if PA service status turns to [Recovery], and then refer to DL PA Alarms. If PA still shutdown, the PA module maybe damaged, please contact with Comba to replace the RU. LNA Alarm Uplink LNA modual damaged, please contact with Comba to replace the RU. End of Section

ENU STATUS : 1-0-0 Copyright - refer to title page Page 64 7 APPENDICES 7.1 APPENDIX A: TOOLS FOR INSTALLATION AND MAINTENANCE The following tools (not included in package) are required for installation or routine maintenance:  Power Drill (for wall mount)  Adjustable Wrench (0.31 inch~0.79 inch)  Philips Screwdriver  Allen wrench (M6)  Signal generator support output power 10dB.  Site Master

ENU STATUS : 1-0-0 Copyright - refer to title page Page 65 7.2 APPENDIX B: RMA (RETURN MATERIAL AUTHORIZATION) End of Section End of Document FOR NAM OFFICE EMAIL, PLEASE INSERT: [email protected]