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Huawei DBS3900 Installation Manual

Huawei DBS3900 Installation Manual

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Download this manual See also: Installation Manual, Product Description
RRU3249
Installation Guide
Issue
DraftA
Date
2015-05-30
HUAWEI TECHNOLOGIES CO., LTD.

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Summary of Contents for Huawei DBS3900

  • Page 1 RRU3249 Installation Guide Issue DraftA Date 2015-05-30 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

    In addition, it specifies the skills and prerequisites that installation engineers must have. 3 Information About the Installation Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation options and installation clearance requirements. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • 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 DraftA (2015-05-30) 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 DraftA (2015-05-30) 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 7: Table Of Contents

    7.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable..............49 7.8 Installing an RRU Alarm Cable............................51 7.9 Opening the Cover Plate of an RRU Cabling Cavity....................53 Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 9: Changes In The Rru3249 Installation Guide

    1 Changes in the RRU3249 Installation Guide Changes in the RRU3249 Installation Guide This chapter describes the changes in the RRU3249 Installation Guide. Draft A (2015-05-30) This is a draft. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • 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 DraftA (2015-05-30) 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 φ12 bit) ESD gloves Vacuum cleaner Heat gun Phillips screwdriver (M3 to Flat-head screwdriver (M3 to Rubber mallet COAX crimping tool Wire stripper Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 12 (M3 to M6) (M3 to M6) Multimeter Measuring tape Marker (diameter ≤ 10 mm [0.39 in.]) Inner hexagon wrench Fixed pulley Lifting sling 5 mm Hydraulic pliers Issue DraftA (2015-05-30) 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 DraftA (2015-05-30) 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 DraftA (2015-05-30) 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 3-4 shows the ports on the RRU panels. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 17 (2) Ports in the cabling 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 18: Rru Indicators

    The board software is being loaded or the 0.125s and off for board is not working. 0.125s) Steady on Alarms are generated, and the module must be replaced. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 19 CPRI ports. Steady off The optical module cannot be detected or is powered off. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 20: Installation Options

    The recommended thickness of the pole wall is 3.5 mm (0.14 in.) or above. Figure 3-6 shows two RRUs installed in centralized mode. Figure 3-7 shows three RRUs installed in centralized mode. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 21 3 Information About the Installation Figure 3-6 Two RRUs installed in centralized mode Figure 3-7 Three RRUs installed in centralized mode Figure 3-8 shows four RRUs installed in centralized mode. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 22: Installation Clearance Requirements Of An Rru

    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. 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.
  • Page 23 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. Figure 3-10 Minimum installation clearance for multiple RRUs installed in centralized mode Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 24: Installation Spacing Between Rrus

    RRUs. Figure 3-11 Recommended horizontal spacing between RRUs Figure 3-12 shows the recommended vertical spacing between RRUs. Figure 3-12 Recommended vertical spacing between RRUs Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 25: 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 DraftA (2015-05-30) Huawei Proprietary and Confidential...
  • Page 26 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 27: 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 28 RRU3249 Installation Guide 5 Installation Process Figure 5-1 Process of installing an RRU Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 29: 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 30: 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 31 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 32 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-6. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 33 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 34: 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 35 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 36 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 37 Figure 6-13 Hoisting the pole onto the tower (1) Traction sling (2) Lifting sling (3) Fixed pulley Hoist the RRU onto the tower, as shown in Figure 6-14. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 38 Align the backplane with the holes on the upper mounting bracket, install screws on the holes, and secure the backplane to the upper mounting bracket by tightening the screws, as shown in Figure 6-15. Issue DraftA (2015-05-30) 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 and the L plate on the lower mounting bracket ----End Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 40: 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 41 RRU3249 Installation Guide 7 Installing RRU Cables This section describes the procedure for closing the cover plate of an RRU cabling cavity. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 42: Cabling Requirements

    Reserve a proper distance (0.1 m or 3.937 in. is recommended) between equipment and cables especially at the cable curves to protect the cables and equipment. Indoor cabling requirements Route each cable into the room through the feeder window. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 43 A 3-hole clip is shown by illustration a in the following figure. It is often used to fasten feeders. A 6-hole clip is shown by illustration b in the following figure. It is often used to fasten power cables and CPRI fiber optic cables. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 44 The following figure shows the cables secured on a cable tray. Figure 7-2 Cables secured on a cable tray (1) 3-hole clip (2) 6-hole clip The following figure shows the cables secured on a tower. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 45 Cables can only be laid out under well-planned instructions. The cabling activities of fiber optic cables are allowed only when qualified personnel and communication facilities are available. Do not circle and twist cables. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 46 At least three people are required for laying out fiber optic cables. The cabling activities of fiber optic cables are allowed only when qualified personnel and communication facilities are available. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 47 The fiber optic cables must not be pressed by the door of the cabinet when routed, as shown in the following figures. Figure 7-6 CPRI fiber optic cables routed in the cabinet (1) Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 48: Rru Cable Connections

    7.2 RRU Cable Connections This section describes RRU cable connections. NOTE The RRU does not support power cable cascading. Figure 7-9 shows the cable connections of a single RRU. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 49 (3) RRU AISG multi-wire cable (4) RRU AISG extension cable (5) RRU power cable (6) CPRI optical fiber (7) RRU alarm cable Figure 7-10 shows the cable connections of multiple RRUs. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 50: Installing Rru Cables

    (3) RRU power cable (4) CPRI optical fiber 7.3 Installing RRU Cables This chapter describes the procedure for installing RRU cables. Figure 7-11 shows the procedure for installing RRU cables. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 51: Rru Cables

    RRU PGND OT terminal Ground OT terminal Ground terminal Cable terminal on the on the ground bar (M6, 16 mm (M8, 16 mm 0.025 in. 0.025 in. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 52: Installing An Rru Pgnd Cable

    OT terminal at one end and an M8 terminal at the other end. DANGER Install RRU PGND cables by strictly following the following operations. Otherwise, damage to the RRU or personal injury may occur. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 53 Figure 7-12 Installing an RRU PGND cable NOTE Crimp OT terminals in correct positions, as shown in Figure 7-13. Figure 7-13 Correct position of an OT terminal Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 54: Installing An Rru Rf Jumper

    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 7-15. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 55 PVC insulation tape. Step 4 Check the dustproof caps on antenna connectors. In outdoor scenarios, dustproof caps must be waterproofed, as shown in Figure 7-16. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 56 Step 5 Route the cables according to the instructions in Cabling 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 57: 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 7-17. Figure 7-17 Installing an RRU AISG multi-wire cable Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 58 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 7-19. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 59: 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 7-20. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 60 Figure 7-21 shows the method for handling cord end terminals not in use. Figure 7-21 Method for handling cord end terminals that are not in use Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 61: Opening The Cover Plate Of An Rru Cabling Cavity

    Figure 7-22 Opening the cover plate of the RRU cabling cavity (1) Cover plate (2) Cabling cavity (3) Clip (4) Cable trough for the power cable (5) Waterproof block (6) Cable trough for the fiber optical cable Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 62: Installing A Cpri Optical Cable

    MM indicates a multimode optical module. Color of the puller on an optical module: Blue indicates a single-mode optical module, and black or gray indicates a multimode optical module. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 63 20 minutes. 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 7-25. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 64: 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 65 Side. A connector or OT terminals are added to the RRU power cable on the power device side. For details, see DBS3900 Installation Guide. Context If a power device provided by the customer is used, the recommended specification of the circuit breaker on this power device is 15 A to 30 A.

  • Page 66: Closing The Cover Plate Of An Rru Cabling Cavity

    Step 1 Close the clips for the installed cables. Use an M4 torque screwdriver to tighten the screws on each clip to 1.4 N·m (12.39 lbf·in.), as shown in Figure 7-27. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 67 Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure 7-28. NOTICE Ensure that cables and waterproof blocks are properly inserted into troughs. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 68 2 N·m (17.7 lbf·in.) in the same sequence. NOTICE The RRU cabling cavity must be securely tightened to prevent water. Figure 7-29 Closing the cover plate of an RRU cabling cavity Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 69 RRU3249 Installation Guide 7 Installing RRU Cables Step 4 Take off the ESD gloves, and pack up all the tools. ----End Issue DraftA (2015-05-30) 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. All ground cables are properly grounded. Issue DraftA (2015-05-30) 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 DraftA (2015-05-30) 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 DraftA (2015-05-30) 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 DraftA (2015-05-30) 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

    Side by strictly following the following operations. Otherwise, damage to the RRU or personal injury may occur. Procedure Step 1 Determine the length of the power cable for different operations based on the labels, as shown Figure 10-2. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 75 10-4. Figure 10-4 Stripping the sheath off each core wire Figure 10-5 Matched length Step 4 Add a tool-less female connector (pressfit type) to two core wires. Issue DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 76 After the core wires are installed, ensure that each core wire is securely installed after being dragged with a torque of 30 N•m and all copper wires are inserted in the connector terminal socket. Issue DraftA (2015-05-30) 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 DraftA (2015-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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