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Huawei RRU3269 Installation Manual

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RRU3269
Installation Guide
Issue
Draft A
Date
2014-10-31
HUAWEI TECHNOLOGIES CO., LTD.

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  • Page 1 RRU3269 Installation Guide Issue Draft A Date 2014-10-31 HUAWEI TECHNOLOGIES CO., LTD.
  • Page 2 All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope.

  • Page 3: About This Document

    Installation Guide About This Document About This Document Purpose This document describes the process of installing a DC blade RRU3269 (referred to as RRU in this document). Product Version The following table lists the product version related to this document.
  • Page 4 Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results. NOTICE is used to address practices not related to personal injury. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 5 Optional items are grouped in brackets and separated by [ x | y | ... ] vertical bars. Several items or no item can be selected. GUI Conventions Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 6 Press the primary mouse button twice continuously and quickly without moving the pointer. Drag Press and hold the primary mouse button and move the pointer to a certain position. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 7: Table Of Contents

    RRU3269 Installation Guide Contents Contents About This Document........................ii 1 Changes in the RRU3269 Installation Guide................1 2 Installation Preparations......................2 2.1 Reference Documents..............................3 2.2 Tools and Instruments..............................3 2.3 Skills and Requirements for Onsite Personnel.......................5 3 Information About the Installation...................6 3.1 RRU Exterior..................................7 3.2 RRU Ports..................................8...
  • Page 8 8 Checking the RRU Hardware Installation................62 9 Powering On an RRU.........................63 10 Appendix.............................65 10.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side......66 Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 9: Changes In The Rru3269 Installation Guide

    RRU3269 Installation Guide 1 Changes in the RRU3269 Installation Guide Changes in the RRU3269 Installation Guide This chapter describes the changes in the RRU3269 Installation Guide. Draft A (2014-10-31) This is a draft. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential...

  • Page 10: Installation Preparations

    2.3 Skills and Requirements for Onsite Personnel Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 11: Reference Documents

    You must prepare the following tools and instruments before the installation. Hammer drill (a bit) ESD gloves Vacuum cleaner Heat gun Phillips screwdriver (M3 to Flat-head screwdriver (M3 to Rubber mallet COAX crimping tool Wire stripper Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 12 5 mm (M3 to M6) (M3 to M6) Multimeter Measuring tape Marker (diameter ≤ 10 mm [0.39 in.]) Inner hexagon wrench Fixed pulley Lifting sling Hydraulic pliers Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 13: Skills And Requirements For Onsite Personnel

    Before the installation, pay attention to the following items: The customer's technical engineers must be trained by Huawei and be familiar with the proper installation and operation methods. The number of onsite personnel depends on the engineering schedule and installation environment.

  • Page 14: Information About The Installation

    3.5 Installation Clearance Requirements of an RRU This section describes the requirements for the installation clearance of multiple RRUs and the requirements for the installation spacing between RRUs. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 15: Rru Exterior

    This section describes the exterior and dimensions of an RRU. Figure 3-1 shows the exterior of an RRU. Figure 3-1 RRU exterior Figure 3-2 shows RRU dimensions. Figure 3-2 RRU dimensions Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 16: Rru Ports

    This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Figure 3-3 Figure 3-4 show ports on the RRU1 and RRU2 panels, respectively. Figure 3-3 Ports on the RRU1 panels Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 17 RTN(+) Power supply socket, for details about RRU cavity power cable experience and specifications, NEG(-) see RRU Power Cable. CPRI0 Optical/electrical port 0, connected to the Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 18 RRU Power Cable. CPRI0 Optical/electrical port 0, connected to the CPRI1 Optical/electrical port 1, connected to the (3) Indicator For details, see 3.3 RRU Indicators. VSWR CPRI0 CPRI1 Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 19: Rru Indicators

    Blinking (on for VSWR alarms are generated on the 1s and off for 1s) ANT_TX/RXB port. Steady on VSWR alarms are generated on the ANT_TX/RXA port. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 20: Installation Options

    This section describes RRU installation options. RRU installation supports the centralized mode. Figure 3-5 shows the diameter of a pole for installing an RRU. Figure 3-5 Diameter of a pole Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 21 Figure 3-6 shows two RRUs installed in centralized mode. Figure 3-7 shows three RRUs installed in centralized mode. Figure 3-6 Two RRUs installed in centralized mode Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 22 RRUs installed in centralized mode. Figure 3-8 Four RRUs installed in centralized mode NOTE For details about how to install RRUs on an IFS06, see DBS3900 (ICR) Installation Guide. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 23: Installation Clearance Requirements Of An Rru

    Figure 3-9 Recommended installation clearance for multiple RRUs installed in centralized mode Minimum Installation Clearance for Multiple RRUs Installed in Centralized Mode Figure 3-10 shows the minimum installation clearance for multiple RRUs installed in centralized mode. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 24: Installation Spacing Between Rrus

    This section describes the horizontal and vertical spacing between RRUs. Figure 3-11 shows the recommended horizontal spacing between RRUs. Figure 3-11 Recommended horizontal spacing between RRUs Figure 3-12 shows the recommended vertical spacing between RRUs. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 25 RRU3269 Installation Guide 3 Information About the Installation Figure 3-12 Recommended vertical spacing between RRUs Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 26: Unpacking The Equipment

    The total number does not tally with the Find out the cause and report any missing packing list articles to the local Huawei office. Step 2 Check the exterior of the packing case. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential...
  • Page 27 Sign the Packing List with the customer. those on the packing list Either shipment shortage, wrong shipment Report to the local Huawei office. or damaged articles. CAUTION l To protect the equipment and prevent damage to the equipment, you are advised to keep the...

  • Page 28: Installation Process

    The installation process involves installing an RRU and RRU cables, checking the RRU hardware installation, and powering on the RRU. Figure 5-1 shows the process of installing an RRU. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 29 RRU3269 Installation Guide 5 Installation Process Figure 5-1 Process of installing an RRU Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 30: Installing The Rru

    This section describes the procedure for installing the RRU on a pole in centralized mode. 6.3 Installing the RRU on a Tower This section describes the procedure for installing the RRU on a tower in centralized mode. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 31: Mounting Kits For An Rru

    Step 1 Install the upper mounting bracket on the pole, use a level to check that the mounting support is level, and tighten the screws on the mounting bracket to 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-2. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 32 5 N·m (44.25 lbf·in.), as shown in Figure 6-3. Figure 6-3 Securing the backplane to the RRU NOTICE The installing method in Figure 6-4 is incorrect. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 33 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-6. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 34 Step 7 Install the backplane and L plate on the lower mounting bracket, and tighten the screws on the bracket to 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-8. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 35: Installing The Rru On A Tower

    Step 1 Hoist the RRU onto a tower. Install upper and lower mounting brackets on a pole, and then bind the pole using a lifting sling, as shown in Figure 6-9. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 36 Install the backplane on the RRU, and bind the RRU using a lifting sling and traction sling, as shown in Figure 6-10. Figure 6-10 Installing the backplane and binding the RRU (1) Handle (2) Lifting sling (3) Traction eye (4) Traction sling Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 37 Figure 6-12 are incorrect. Figure 6-11 Incorrect binding method (1) Figure 6-12 Incorrect binding method (2) Hoist the pole onto the tower, as shown in Figure 6-13. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 38 (1) Traction sling (2) Lifting sling (3) Fixed pulley Hoist the RRU onto the tower, as shown in Figure 6-14. Figure 6-14 Hoisting the RRU onto the tower Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 39 Install the backplane and the L plate on the lower mounting bracket, as shown in Figure 6-16. Figure 6-16 Installing the backplane the L plate on the lower mounting bracket Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 40 6 Installing the RRU NOTICE If no clearance is reserved for waterproofing RF ports, remove the safety belt before wrapping waterproof tape, and then reinstall the safety belt. ----End Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 41: Installing Rru Cables

    7.11 Installing an RRU Power Cable This section describes the procedure for installing an RRU power cable. 7.12 Closing the Cover Plate of an RRU Cabling Cavity Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 42 RRU3269 Installation Guide 7 Installing RRU Cables This section describes the procedure for closing the cover plate of an RRU cabling cavity. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 43: Cabling Requirements

    Sufficient slack (recommended for about 0.1 m [0.33 ft]) is provided in cables at turns or the position close to a device, facilitating cable and device maintenance. Indoor Cabling Requirements Cables are routed indoors through the feeder window. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 44 Cable clips must be vertical with cables, and the cables in a cable clip must be parallel. After routing cables neatly and correctly, tighten the screws on cable clips. Secure cables on the cable tray, as shown in Figure 7-1. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 45 RRU3269 Installation Guide 7 Installing RRU Cables Figure 7-1 Securing cables on the cable tray Secure cables on the tower, as shown in Figure 7-2. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 46 If DC power cables need to be routed on the tower platform, lay out the cables on the guardrail with the shortest distance and route the cables along the guardrail. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 47 Fiber optic cables are used within the temperature range of -40°C to 60°C. If the current temperature is out of the range, make protection measures or route the cables again. Cables are routed in an untangled and orderly fashion. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 48 Fiber optic cables cannot be squeezed by the cabinet door when routed through the cabinet, as shown in Figure 7-5, Figure 7-6 Figure 7-7. Figure 7-5 CPRI fiber optic cables routed through the cabinet (1) Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 49: Rru Cable Connections

    7.2 RRU Cable Connections This section describes RRU cable connections. NOTE The RRU does not support power cable cascading. Figure 7-8 shows the cable connections of a single RRU. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 50 (4) RRU AISG extension cable (5) RRU power cable (6) CPRI optical fiber (7) RRU alarm cable Figure 7-9 shows the cable connections of multiple RRUs. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 51: Installing Rru Cables

    (4) CPRI optical fiber 7.3 Installing RRU Cables This chapter describes the procedure for installing RRU cables. Figure 7-10 shows the procedure for installing RRU cables. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 52: Rru Cables

    RRU PGND OT terminal (M6, Ground OT terminal Ground terminal Cable terminal on the on the ground bar 16 mm or 0.025 (M8, 16 mm 0.025 in. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 53: Installing An Rru Pgnd Cable

    PGND cable. Then, add an OT terminal at each end of the cable according to the instructions in Assembling the OT Terminal and the Power Cable. Step 2 Install the RRU PGND cable. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 54: Installing An Rru Rf Jumper

    Step 3 Label the installed cable according to the instructions in Attaching a Cable-Tying Label. ----End 7.6 Installing an RRU RF Jumper This section describes the procedure for installing an RRU RF jumper. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 55 Step 2 Connect the other end of the RF jumper to the external antenna system. Step 3 Waterproof the connectors of the RF jumper by referring to Figure 7-14. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 56 PVC insulation tape. Step 4 Check the dustproof caps on antenna connectors. In outdoor scenarios, dustproof caps must be waterproofed, as shown in Figure 7-15. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 57 Requirements, and then use cable ties to bind the cables. Step 6 Label the installed cables according to the instructions in Attaching a Sign Plate Label. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 58: Installing An Rru Aisg Multi-Wire Cable And Aisg Extension Cable

    Link the waterproofed DB9 connector at one end the AISG multi-wire cable to the RET port on the RRU bottom, as shown in Figure 7-16. Figure 7-16 Installing an RRU AISG multi-wire cable Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 59 DB9 connector to 0.4 N·m (3.54 lbf·in.). Connect the other end of the AISG extension cable to the standard AISG male connector on the RCU, as shown in Figure 7-18. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 60: Installing An Rru Alarm Cable

    Step 2 Connect the waterproof DB15 connector at one end of the RRU alarm cable to the EXT_ALM port on the RRU, as shown in Figure 7-19. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 61 Figure 7-20 Method for handling cord end terminals that are not in use Step 4 Route the cables according to the instructions in 7.1 Cabling Requirements, and then use cable ties to bind the cables. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 62: Opening The Cover Plate Of An Rru Cabling Cavity

    (5) Waterproof block (6) Cable trough for the fiber optical cable Step 3 Loosen the screws on the clip using an M4 Phillips screwdriver, and open the clip, as shown in Figure 7-22. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 63: Installing A Cpri Optical Cable

    Color of the puller on an optical module: Blue indicates a single-mode optical module, and black or gray indicates a multimode optical module. NOTICE The optical modules to be installed must match CPRI rates. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 64 Step 2 Connect the end labeled 1A and 1B of the optical cable to the optical module on the RRU side, as shown in Figure 7-24. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 65: Installing An Rru Power Cable

    Step 5 Label the installed cables according to the instructions in Attaching an L-Shaped Label. ----End 7.11 Installing an RRU Power Cable This section describes the procedure for installing an RRU power cable. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 66 Ensure that the exposed shield layer of the power cable is properly tightened using the clip. Step 2 Connect the connector at the other end of the RRU power cable to the corresponding position on the power device. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 67: Closing The Cover Plate Of An Rru Cabling Cavity

    1.4 N·m (12.39 lbf·in.), as shown in Figure 7-26. NOTICE Ensure that the exposed shield layer of the power cable is properly tightened using the clip. Figure 7-26 Closing clips Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 68 Figure 7-28. Then tighten the screws to 2 N·m (17.7 lbf·in.) in the same sequence. Figure 7-28 Closing the cover plate of an RRU cabling cavity Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 69 RRU3269 Installation Guide 7 Installing RRU Cables Step 4 Take off the ESD gloves, and pack up all the tools. ----End Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 70: Checking The Rru Hardware Installation

    The connectors of each signal cable are intact and securely linked, and these cables are not damaged or broken. Labels are correct, legible, and complete at both ends of each cable, feeder, and jumper. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 71: Powering On An Rru

    For details about how to power on an RRU, see Powering On an RRU. For details about how to power off an RRU, see section "Powering-Off the RRU" in RRU Maintenance Guide. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 72 -36 V DC to -57 V DC. (b) The RUN indicator on the RRU is on for 1s and off for 1s. The ALM indicator is steady off. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 73: Appendix

    10.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side This section describes the procedure for adding a tool-less female connector (pressfit type) to the RRU power cable on the RRU side. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 74: Adding A Tool-Less Female Connector (Pressfit Type) To The Rru Power Cable On The Rru Side

    Step 1 Determine the length of the power cable for different operations based on the labels, as shown Figure 10-2. Figure 10-2 Determining the length of the power cable Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 75 Figure 10-5 Matched length Step 4 Add a tool-less female connector (pressfit type) to two core wires. Tighten the screws using a Phillips screwdriver, as shown in Figure 10-6. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 76 Figure 10-7 Adding a tool-less female connector (pressfit type) to two core wires Step 5 Strip the specified length of the sheath off the power cable to expose the intact shield layer, as shown in Figure 10-8. Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 77 Each core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm (0.059 [in.]), as shown in Figure 10-9. Figure 10-9 Inserting core wires into the tool-less female connector (pressfit type) ----End Issue Draft A (2014-10-31) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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