Huawei Technologies RRU3971PCS Remote Radio Unit User Manual Installation Guide

Huawei Technologies Co.,Ltd Remote Radio Unit Installation Guide

Contents

Installation Guide

IssueDateHUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2015. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial BaseBantian, LonggangShenzhen 518129People's Republic of ChinaWebsite: http://www.huawei.comEmail: support@huawei.comIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.i
About This DocumentPurposeThis document describes the process of installing DC blade RRU3971 (referred to as RRU inthis document).Product VersionsThe following table lists the product versions related to this document.Product Name Solution Version Product VersionDBS3900 lSRAN9.0lGBSS16.0leRAN7.0V100R009C00lSRAN10.1 and laterversionslGBSS17.1 and laterversionsleRAN8.1 and laterversionsV100R010C10 and laterversions Intended AudienceThis document is intended for:Base station installation engineersOrganization1 Changes in RRU3971 Installation GuideThis section describes the changes in the RRU3971 Installation Guide.2 Installation PreparationsAbout This DocumentIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.ii
This chapter describes the reference documents, tools, and instruments that must be ready beforethe installation. In addition, it specifies the skills and prerequisites that installation engineersmust have.3 Information About the InstallationBefore installing an RRU, you must be familiar with its exterior, ports, indicators, installationoptions and installation clearance requirements.4 Unpacking the EquipmentThis chapter describes how to unpack and check the delivered equipment to ensure that all thematerials are included and intact.5 Installation ProcessThe installation process involves installing an RRU and RRU cables, checking the RRUhardware installation, and powering on an RRU.6 Hoisting an RRU and Related Cables onto a TowerThis section describes the procedure for hoisting an RRU and related cables onto a tower andthe precautions that must be taken.7 Installing the RRUThis chapter describes the procedure for installing the RRU. The procedure for installing theRRU varies depending on installation options.8 Installing RRU CablesThis chapter describes the procedure for installing RRU cables.9 Checking the RRU Hardware InstallationAfter an RRU is installed, check the hardware installation.10 Powering On an RRUAfter all the devices are installed, check the power-on status of an RRU.11 AppendixConventionsSymbol ConventionsThe symbols that may be found in this document are defined as follows.Symbol DescriptionIndicates an imminently hazardous situation which, if notavoided, will result in death or serious injury.Indicates a potentially hazardous situation which, if notavoided, could result in death or serious injury.About This DocumentIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iii
Symbol DescriptionIndicates a potentially hazardous situation which, if notavoided, may result in minor or moderate injury.Indicates a potentially hazardous situation which, if notavoided, could result in equipment damage, data loss,performance deterioration, or unanticipated results.NOTICE is used to address practices not related to personalinjury.Calls attention to important information, best practices andtips.NOTE is used to address information not related to personalinjury, equipment damage, and environment deterioration. General ConventionsThe general conventions that may be found in this document are defined as follows.Convention DescriptionTimes New Roman Normal paragraphs are in Times New Roman.Boldface Names of files, directories, folders, and users are inboldface. For example, log in as user root.Italic Book titles are in italics.Courier New Examples of information displayed on the screen are inCourier New. Command ConventionsThe command conventions that may be found in this document are defined as follows.Convention DescriptionBoldface The keywords of a command line are in boldface.Italic Command arguments are in italics.[ ] Items (keywords or arguments) in brackets [ ] are optional.{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.About This DocumentIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.iv
Convention Description{ x | y | ... }*Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.[ x | y | ... ]*Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected. GUI ConventionsThe GUI conventions that may be found in this document are defined as follows.Convention DescriptionBoldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.>Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder. Keyboard OperationsThe keyboard operations that may be found in this document are defined as follows.Format DescriptionKey Press the key. For example, press Enter and press Tab.Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means the three keys should be pressed concurrently.Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn. Mouse OperationsThe mouse operations that may be found in this document are defined as follows.Action DescriptionClick Select and release the primary mouse button without movingthe pointer.Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.About This DocumentIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.v
Action DescriptionDrag Press and hold the primary mouse button and move thepointer to a certain position.About This DocumentIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vi
ContentsAbout This Document.....................................................................................................................ii1 Changes in RRU3971 Installation Guide..................................................................................12 Installation Preparations..............................................................................................................22.1 Reference Documents.....................................................................................................................................................32.2 Tools and Instruments....................................................................................................................................................32.3 Skills and Requirements for Onsite Personnel...............................................................................................................53 Information About the Installation...........................................................................................63.1 RRU Exterior..................................................................................................................................................................73.2 RRU Ports.......................................................................................................................................................................83.3 RRU Indicators.............................................................................................................................................................103.4 Installation Scenarios....................................................................................................................................................123.5 Installation Clearance Requirements of an RRU..........................................................................................................233.5.1 Clearance for a Single RRU......................................................................................................................................233.5.2 Clearance for Three or More RRUs...........................................................................................................................273.5.3 Installation Spacing Between RRUs..........................................................................................................................314 Unpacking the Equipment.........................................................................................................345 Installation Process.....................................................................................................................366 Hoisting an RRU and Related Cables onto a Tower............................................................376.1 Hoisting an RRU onto a Tower....................................................................................................................................386.2 Hoisting Fiber Optic Cables onto a Tower...................................................................................................................426.3 Hoisting Power Cables onto a Tower...........................................................................................................................457 Installing the RRU.......................................................................................................................487.1 Mounting Kits for an RRU...........................................................................................................................................497.2 Installing the RRU on a Pole........................................................................................................................................507.2.1 Installing a Single RRU.............................................................................................................................................507.2.2 Installing Two RRUs.................................................................................................................................................537.2.3 Installing Three or More RRUs.................................................................................................................................587.3 Installing an RRU on U-steel .......................................................................................................................................637.4 Installing an RRU on Angle Steel................................................................................................................................687.5 Installing an RRU on a Wall.........................................................................................................................................73ContentsIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.vii
7.6 Installing an RRU on an IFS06.....................................................................................................................................788 Installing RRU Cables................................................................................................................858.1 Cabling Requirements..................................................................................................................................................878.2 RRU Cable Connections...............................................................................................................................................948.3 Installing RRU Cables..................................................................................................................................................978.4 RRU Cables..................................................................................................................................................................988.5 Installing an RRU PGND Cable...................................................................................................................................998.6 Installing an RRU RF Jumper....................................................................................................................................1018.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable...................................................................1048.8 Installing an RRU Alarm Cable..................................................................................................................................1078.9 Opening the Cover Plate of an RRU Cabling Cavity.................................................................................................1098.10 Installing a CPRI Optical Cable...............................................................................................................................1108.11 Installing an RRU Power Cable................................................................................................................................1128.12 Closing the Cover Plate of an RRU Cabling Cavity................................................................................................1159 Checking the RRU Hardware Installation............................................................................11810 Powering On an RRU.............................................................................................................11911 Appendix...................................................................................................................................12111.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side......................122ContentsIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.viii
1 Changes in RRU3971 Installation GuideThis section describes the changes in the RRU3971 Installation Guide.Draft A (2015-09-30)This is a draft.1 Changes in RRU3971 Installation GuideIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.1
2 Installation PreparationsAbout This ChapterThis chapter describes the reference documents, tools, and instruments that must be ready beforethe installation. In addition, it specifies the skills and prerequisites that installation engineersmust have.2.1 Reference DocumentsBefore the installation, you must be familiar with reference documents.2.2 Tools and InstrumentsYou must prepare the following tools and instruments before the installation.2.3 Skills and Requirements for Onsite PersonnelOnsite personnel must be qualified and trained. Before performing any operation, onsitepersonnel must be familiar with correct operation methods and safety precautions.2 Installation PreparationsIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.2
2.1 Reference DocumentsBefore the installation, you must be familiar with reference documents.The following reference documents are required during RRU installation:lRRU3971 Hardware DescriptionlDBS3900 Installation GuidelOCB User GuidelOCB-01M User Guide2.2 Tools and InstrumentsYou must prepare the following tools and instruments before the installation.Hammer drill (a φ12 bit) ESD gloves Vacuum cleanerHeat gun Phillips screwdriver (M3 toM6)Flat-head screwdriver (M3 toM6)Rubber mallet COAX crimping tool Wire stripper2 Installation PreparationsIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.3
Utility knife Cable cutter Adjustable wrench (size ≥ 32mm [1.26 in.])Torque wrenchSize: 16 mm (0.63 in.) and 22mm (0.87 in.)Combination wrenchSize: 16 mm (0.63 in.) and 22mm (0.87 in.)Level Torque screwdriver5 mm5 mm(M3 to M6)(M3 to M6)Torque socketMultimeter Marker (diameter ≤ 10 mm[0.39 in.])Measuring tapeInner hexagon wrench5 mmFixed pulley(weight-bearingcapacity > 500 kg or 1102.5lb)Lifting slingHydraulic pliers - -2 Installation PreparationsIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.4
2.3 Skills and Requirements for Onsite PersonnelOnsite personnel must be qualified and trained. Before performing any operation, onsitepersonnel must be familiar with correct operation methods and safety precautions.Before the installation, pay attention to the following items:lThe customer's technical engineers must be trained by Huawei and be familiar with theproper installation and operation methods.lThe number of onsite personnel depends on the engineering schedule and installationenvironment. Generally, only three to five onsite personnel are necessary.2 Installation PreparationsIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.5
3 Information About the InstallationAbout This ChapterBefore installing an RRU, you must be familiar with its exterior, ports, indicators, installationoptions and installation clearance requirements.3.1 RRU ExteriorThis section describes the exterior and dimensions of an RRU.3.2 RRU PortsThis section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavitypanel, and indicator panel.3.3 RRU IndicatorsThis section describes six indicators on an RRU. They indicate the running status of the RRU.3.4 Installation ScenariosAn RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenariosmust meet heat-dissipation and waterproofing requirements of the RRU.3.5 Installation Clearance Requirements of an RRUThis section describes the requirements for the installation clearance of a single RRU andmultiple RRUs and the requirements for the installation spacing between RRUs.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.6
3.1 RRU ExteriorThis 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 dimensions3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.7
You can obtain the RRU name, RRU frequency band and power supply information from thenameplate on the cover plate. Figure 3-3 shows the positions of the nameplate on the RRU.NOTEThe actual nameplate may differ from what is shown in the figure.Figure 3-3 Positions of the nameplate(1) Nameplate (2) Module name (3) Frequency band (4) Power supply module 3.2 RRU PortsThis section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavitypanel, and indicator panel.Figure 3-4 shows the ports on the RRU panels.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.8
Figure 3-4 Ports on the RRU panels Table 3-1 describes ports and indicators on the RRU panels.Table 3-1 Ports and indicators on the RRU panelsItem Silkscreen Remarks(1) Ports in the cablingcavityRTN(+) Power supply socket, for details about RRUpower cable experience and specifications,see RRU Power Cable.NEG(-)CPRI0 Optical/electrical port 0, connected to theBBUCPRI1 Optical/electrical port 1, connected to theBBU3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.9
Item Silkscreen Remarks(2) Bottom ports A T/R TX/RX port A, supporting RET signaltransmissionC T/R TX/RX port CD T/R TX/RX port DB T/R TX/RX port B, supporting RET signaltransmissionEXT_ALM Alarm monitoring port used for monitoringone RS485 signal and two dry contact signalsRET Communication port for the RET antenna,supporting RET signal transmission(3) Indicator RUN For details, see 3.3 RRU Indicators.ALMACTVSWRCPRI0CPRI1 NOTElThe port for transmitting RET signals is determined by the software.lConnect the CPRI0 port to the BBU by default in the single-mode scenario.3.3 RRU IndicatorsThis section describes six indicators on an RRU. They indicate the running status of the RRU.For detailed positions of RRU indicators, see 3.2 RRU Ports.Table 3-2 describes RRU indicators.Table 3-2 RRU IndicatorsIndicator Color Status MeaningRUN Green Steady on The power input is available, but the board isfaulty.Steady off No power input is available or the board isfaulty.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.10
Indicator Color Status MeaningBlinking (on for1s and off for 1s)The board is running properly.Blinking (on for0.125s and off for0.125s)The board software is being loaded or theboard is not working.ALM Red Steady on Alarms are generated, and the module mustbe replaced.Blinking (on for1s and off for 1s)Alarms are generated. The alarms may becaused by faults on the related board or ports.Therefore, you need to locate the fault beforedeciding whether to replace the module.Steady off No alarms are generated.ACT Green Steady on The board is working properly when TXchannels are enabled or software is beingloaded to a board that is not started.Blinking (on for1s and off for 1s)The board is running with TX channelsdisabled.VSWR Red Steady off No voltage standing wave ratio (VSWR)alarm is generated.Blinking (on for1s and off for 1s)VSWR alarms are generated on theANT_TX/RXB port.Steady on VSWR alarms are generated on theANT_TX/RXA port.Blinking (on for0.125s and off for0.125s)VSWR alarms are generated on theANT_TX/RXA and ANT_TX/RXB ports.CPRI0 Red andgreenSteady green The CPRI link is running properly.Steady red An optical module fails to receive or transmitsignals possibly because the optical moduleis faulty or the optical fiber is broken.Blinking red (onfor 1s and off for1s)The CPRI link is out of lock because of faultson the mutual lock of dual-mode clocksources or mismatched data rates on CPRIports.Steady off The optical module cannot be detected or ispowered off.CPRI1 Red andgreenSteady green The CPRI link is running properly.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.11
Indicator Color Status MeaningSteady red An optical module fails to receive or transmitsignals possibly because the optical moduleis faulty or the optical fiber is broken.Blinking red (onfor 1s and off for1s)The CPRI link is out of lock because of faultson the mutual lock of dual-mode clocksources or mismatched data rates on CPRIports.Steady off The optical module cannot be detected or ispowered off. NOTEVSWR indicators on RRUs providing one or more than two TX channels have two types of status:lSteady off: No VSWR alarm is generated.lSteady on: VSWR alarms are generated on one or more ports.3.4 Installation ScenariosAn RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenariosmust meet heat-dissipation and waterproofing requirements of the RRU.Requirements for the Installation ScenariosApplication scenarios:To ensure proper heat dissipation of the RRU, the following requirements must be met:lThe RRU cannot be installed in an enclosed cabinet without a cooling system.lThe RRU cannot be installed in an enclosed camouflage box.lThe RRU cannot be installed in an enclosed equipment room without a cooling system.lWhen multiple RRUs are installed in centralized mode, the minimum clearancerequirements must be met. For details about the minimum clearance requirements, see 3.5.2Clearance for Three or More RRUs and 3.5.3 Installation Spacing Between RRUs.lRRU mounting kits in assembled installation mode are not allowed in indoor scenarios.NOTICEIf the RRU is inappropriately installed, heat dissipation of the RRU deteriorates and the RRUmay not work properly, as shown in Figure 3-5.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.12
Figure 3-5 inappropriately installed RRU Correct installation methods:lThe installation supports' specifications described in this document are only based on theexterior and dimensions of the mounting kits. Before installing equipment, assess thestrength and reliability of the installation support to determine whether it can bear the weightof the equipment.lTo ensure the heat dissipation of the RRU and waterproofing of the ports at the bottom ofthe RRU, the vertical deviation angle of an RRU must be less than or equal to 10 degrees,as shown Figure 3-6.lOn a tower, an RRU can be installed on a pole, angle steel, or U-steel. The side-mountedinstallation mode (one side instead of the rear of an RRU is mounted on the support) isrecommended for RRUs on the main pole secured on a tower. This installation mode allowsmultiple RRUs to be installed next to each other at the same level on a pole. When thehorizontal distance between the main and auxiliary poles on a tower is equal to or greaterthan 810 mm (23.62 in.), the side-mounted mode is recommended for installing RRUs onthe auxiliary pole to meet the minimum clearance requirements. Otherwise, the standardmode is recommended for installing RRUs on the auxiliary pole.Figure 3-6 Requirements for the vertical deviation angle of an RRU(1) RRU (2) Installation support (pole, U-steel, angle steel, or wall)3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.13
Installing an RRU on a PoleFigure 3-7 shows the diameter of a pole for installing an RRU.Figure 3-7 Diameter of a pole NOTICElThe diameter of a pole for installing an RRU ranges from 60 mm (2.36 in.) to 114 mm (4.49in.). The recommended diameter is 80 mm (3.15 in.).lWhen the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximumof three RRUs can be installed on the pole and the side-mounted installation is recommended.The RRU installation in standard mode is not recommended.lOnly a pole whose diameter ranges from 76 mm (2.99 in.) to 114 mm (4.49 in.) supportsmore than three RRUs.lThe recommended thickness of the pole wall is 3.5 mm (0.14 in.) or above.Figure 3-8 shows a single RRU installed on a pole.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.14
Figure 3-8 A single RRU installed on a pole Figure 3-9 shows two RRUs installed on a pole.Figure 3-9 Two RRUs installed on a pole Figure 3-10, Figure 3-11, and Figure 3-12 show multiple RRUs installed on a pole.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.15
Figure 3-10 Three RRUs installed on a pole Figure 3-11 Four RRUs installed on a pole 3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.16
Figure 3-12 Six RRUs installed on a pole Installing an RRU on U-SteelFigure 3-13 shows U-steel specifications.Figure 3-13 U-steel specifications NOTICEU-steel only supports the standard installation of a single RRU.Figure 3-14 shows an RRU installed on U-steel.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.17
Figure 3-14 RRU installed on U-steel Installing an RRU on Angle SteelFigure 3-15 shows angle steel specifications.Figure 3-15 Angle steel specifications NOTICEAngle steel only supports the standard installation of a single RRU.Figure 3-16 shows an RRU installed on angle steel.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.18
Figure 3-16 RRU installed on angle steel Installing an RRU on a WallThe wall for installing RRUs must meet the following requirements:lFor each RRU, the wall must be able to bear a weight four times heavier than the RRU'sweight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.lExpansion bolts must be tightened to 30 N•m to ensure that the bolts work properly andthe wall remains intact.NOTICElThe standard installation is recommended for RRUs installed on a wall.lWhen RRUs are installed on a wall in side-mounted mode, do not combine mounting bracketsfor multiple RRUs, as shown in Figure 3-17.Figure 3-17 Correct installation of mounting brackets for multiple RRUs installed on a wall inside-mounted mode3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.19
Figure 3-18 shows an RRU installed on a wall.Figure 3-18 RRU installed on a wall Installing an RRU on an IFS06lThe upper and lower adjustable beams on an IFS06 can be moved up and down to fit forheights of RRUs.lThe IFS06 supports at least three RRUs when the ambient temperature is higher than orequal to the lowest operating temperature of the RRUs and at least 5°C (41°F) lower thanthe highest operating temperature of the RRUs. The IFS06 supports a maximum of sixRRUs when the ambient temperature is higher than or equal to the lowest operatingtemperature of the RRUs and at least 10°C (50°F) lower than the highest operatingtemperature of the RRUs.NOTEFor details about the operating temperature of the RRUs, see section "Technical Specifications ofRRUs" in 3900 Series Base Station Technical Description.NOTICEThe mounting brackets for multiple RRUs cannot be combined when the RRUs are installed onan IFS06, as shown in Figure 3-19.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.20
Figure 3-19 Correct installation of mounting brackets for RRUs installed on an IFS06 Figure 3-20 and Figure 3-21 show RRUs installed on an IFS06.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.21
Figure 3-20 Three RRUs installed on an IFS06(1) Height-restricted scenario (2) Height-unrestricted scenario 3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.22
Figure 3-21 Six RRUs installed on an IFS06(1) Height-restricted scenario (2) Height-unrestricted scenario 3.5 Installation Clearance Requirements of an RRUThis section describes the requirements for the installation clearance of a single RRU andmultiple RRUs and the requirements for the installation spacing between RRUs.3.5.1 Clearance for a Single RRUThis section describes the recommended and minimum clearances for a single RRU.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.23
NOTICEIf an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm ormore as recommended) away from the bitumen ground. The following describes the spacerequirements for installing a single RRU on the non-bitumen ground.NOTElThe recommended clearances ensure normal running and provide appropriate space for operation andmaintenance (O&M). If the installation space is sufficient, leave the recommended clearances afterinstalling the equipment.lThe minimum clearance ensures normal running and heat dissipation, but O&M activities such aschecking indicator status and opening the cabling cavity cannot be properly conducted. If theinstallation space is restricted, leave the minimum clearance after installing the equipment.Clearance for a Single RRU in Side-Mounted ModeFigure 3-22 shows the clearance for a single RRU in side-mounted mode.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.24
Figure 3-22 Clearance for a single RRU in side-mounted mode Clearance for a Single RRU in Standard ModeFigure 3-23 shows the clearance for a single RRU in standard mode.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.25
Figure 3-23 Clearance for a single RRU in standard mode Clearance for a Single Tower-Mounted RRUFigure 3-24 and Figure 3-25 show the minimum clearances for a single RRU in side-mountedmode and standard mode on a tower.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.26
Figure 3-24 Minimum clearance for a single RRU in side-mounted mode on a Figure 3-25 Minimum clearance for a single RRU in standard mode on a tower 3.5.2 Clearance for Three or More RRUsThis section describes the recommended and minimum clearances for three or more RRUs.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.27
NOTICEIf an RRU is installed on the bitumen ground, the RRU must be at least 500 mm (700 mm ormore as recommended) away from the bitumen ground. The following describes the spacerequirements for installing multiple RRUs on the non-bitumen ground.NOTElThe recommended clearances ensure normal running and provide appropriate space for operation andmaintenance (O&M). If the installation space is sufficient, leave the recommended clearances afterinstalling the equipment.lThe minimum clearance ensures normal running and heat dissipation, but O&M activities such aschecking indicator status and opening the cabling cavity cannot be properly conducted. If theinstallation space is restricted, leave the minimum clearance after installing the equipment.Recommended Clearances for Three or More RRUs Installed in Centralized ModeFigure 3-26 shows the recommended clearances for three or more RRUs installed in centralizedmode.Figure 3-26 Recommended clearances for three or more RRUs installed in centralized mode Minimum Clearances for Three or More RRUs Installed in Centralized ModeFigure 3-27 shows the minimum clearances for three or more RRUs installed in centralizedmode.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.28
Figure 3-27 Minimum clearances for three or more RRUs installed in centralized mode Recommended Clearances for Three or More RRUs Installed in Standard Mode ona WallFigure 3-28 shows the recommended clearances for three or more RRUs installed in standardmode on a wall.3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.29
Figure 3-28 Recommended clearances for three or more RRUs installed in standard mode on awall Minimum Clearances for Three or More RRUs Installed in Standard Mode on aWallFigure 3-29 shows the minimum clearances for three or more RRUs installed in standard modeon a wall.Figure 3-29 Minimum clearances for three or more RRUs installed in standard mode on a wall3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.30
Recommended Clearances for Three or More RRUs Installed in Side-MountedMode on a WallFigure 3-30 shows the recommended clearances for three or more RRUs installed in side-mounted mode on a wall.Figure 3-30 Recommended clearances for three or more RRUs installed in side-mounted modeon a wall 3.5.3 Installation Spacing Between RRUsThis section describes the horizontal and vertical spacing between RRUs.Recommended Horizontal Spacing Between RRUsFigure 3-31 shows the recommended horizontal spacing between RRUs.Figure 3-31 Recommended horizontal spacing between RRUs3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.31
Minimum Horizontal Spacing Between RRUsFigure 3-32 shows the minimum horizontal spacing between RRUs.Figure 3-32 Minimum horizontal spacing between RRUs Recommended Vertical Spacing Between RRUsFigure 3-33 shows the recommended vertical spacing between RRUs.Figure 3-33 Recommended vertical spacing between RRUs3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.32
Minimum Vertical Spacing Between RRUsFigure 3-34 shows the minimum vertical spacing between RRUs.Figure 3-34 Minimum vertical spacing between RRUs3 Information About the InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.33
4 Unpacking the EquipmentThis chapter describes how to unpack and check the delivered equipment to ensure that all thematerials are included and intact.ContextNOTEWhen transporting, moving, or installing the equipment, components, or parts, you must:lPrevent them from colliding with doors, walls, shelves, or other objects.lWear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweat-soaked gloves, or dirty gloves.NOTICElAfter a cabinet or an BBU is unpacked, it must be powered on within 7 days.lAfter an RRU is unpacked, it must be powered on within 24 hours.ProcedureStep 1 Check the total number of articles in each case according to the packing list.If ... Then ...The total number tallies with the packinglistGo to Step 2.The total number does not tally with thepacking listFind out the cause and report any missingarticles to the local Huawei office.Step 2 Check the exterior of the packing case.4 Unpacking the EquipmentIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.34
If ... Then ...The outer packing is intact Go to Step 3.The outer packing is severely damaged orsoakedFind out the cause and report it to the localHuawei office.Step 3 Check the type and quantity of the equipment in the cases according to the packing list.If ... Then ...Types and quantity of the article tally withthose on the packing listSign the Packing List with the customer.Either shipment shortage, wrong shipmentor damaged articles.Report to the local Huawei office.CAUTIONlTo protect the equipment and prevent damage to the equipment, you are advised to keep theunpacked equipment and packing materials indoors, take photos of the stocking environment,packing case or carton, packing materials, and any rusted or eroded equipment, and then filethe photos.lVerify that the insulation layers of all RRU cables are intact. If the insulation layers aredamaged or broken, water will penetrate into the cables, which may cause damages to RRUsor human injury.----End4 Unpacking the EquipmentIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.35
5 Installation ProcessThe installation process involves installing an RRU and RRU cables, checking the RRUhardware installation, and powering on an RRU.Figure 5-1 shows the installation process.Figure 5-1 Process of installing an RRU5 Installation ProcessIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.36
6 Hoisting an RRU and Related Cables onto aTowerAbout This ChapterThis section describes the procedure for hoisting an RRU and related cables onto a tower andthe precautions that must be taken.6.1 Hoisting an RRU onto a TowerThis section describes the procedures and precautions for hoisting an RRU and its mounting kitsonto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or anglesteel.6.2 Hoisting Fiber Optic Cables onto a TowerThis section describes the procedure for hoisting fiber optic cables onto a tower and theprecautions that must be taken.6.3 Hoisting Power Cables onto a TowerThis section describes the procedure for hoisting power cables onto a tower and the precautionsthat must be taken.6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.37
6.1 Hoisting an RRU onto a TowerThis section describes the procedures and precautions for hoisting an RRU and its mounting kitsonto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or anglesteel.PrerequisitesWhen the RRU is powered by an AC/DC power module, you need to install the AC/DC powermodule onto the RRU before hoisting them onto a tower. For detailed operations, see AC/DCPower Module User Guide or OPM15M User Guide.NOTICElDo not stand the RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under the RRU to protect the RRU housing from damageduring the installation.ProcedureStep 1 After climbing up to the tower, technician A secures the fixed pulley to the tower platformsupport and leads the lifting sling through the fixed pulley.Step 2 Technician C binds the mounting kits using the lifting sling and traction sling on the ground, asshown in Figure 6-1. Then technician B pulls the lifting sling downwards, and technician Cpulls the traction sling outwards to protect the mounting kits from colliding with the tower.6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.38
Figure 6-1 Binding mounting kits for the RRU(1) Lifting sling (2) Traction slingStep 3 Technician A catches the mounting kits and then unties the slings.Step 4 Install the mounting kits. For detailed operations, see steps 1 to 3 in 7.2.1 Installing a SingleRRU.Step 5 Technician C binds the RRU using the lifting sling and traction sling, as shown in Figure 6-2.The binding methods in Figure 6-3 and Figure 6-4 are incorrect.6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.39
Figure 6-2 Binding the RRU(1) Handle (2) Lifting sling (3) Traction eye (4) Traction sling Figure 6-3 Incorrect binding method (1) 6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.40
Figure 6-4 Incorrect binding method (2) Step 6 Hoist the RRU onto the tower, as shown in Figure 6-5. Technician B pulls the lifting slingdownwards, and technician C pulls the traction sling outwards to protect the RRU from collidingwith the tower.Figure 6-5 Hoisting the RRU onto the tower(1) Lifting sling (2) Fixed pulley (3) Traction sling 6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.41
NOTICElThe load-bearing capacity of each sling must be greater than 200 kg (441 lb) and the diameterof each sling must be less than 25 mm (0.98 in.).lWhen hoisting each device onto a tower, protect them from colliding with the tower.lHoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel.lDo not hoist any thing by the traction eye.Step 7 Technician A catches the RRU hoisted onto the tower.Step 8 Technician A installs the RRU onto the main bracket and uses an inner hexagon torquescrewdriver to tighten the captive screw into the hole of the attachment plate and main bracketto 5 N·m (44.25 lbf·in.). For detailed operations, see steps 4 and 5 in 7.2.1 Installing a SingleRRU.Step 9 Untie the lifting sling and traction sling.NOTEThe procedure for hoisting the RRU and its mounting kits onto the tower is for your reference only.----End6.2 Hoisting Fiber Optic Cables onto a TowerThis section describes the procedure for hoisting fiber optic cables onto a tower and theprecautions that must be taken.ContextCabling requirements for power cables are met. For details, see 8.1 Cabling Requirements.ProcedureStep 1 Hoist the fiber optic cables onto the tower, as shown in Figure 6-6.6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.42
Figure 6-6 Hoisting fiber optic cables onto the tower(1) Lifting sling (2) Fixed pulley (3) Traction slingNOTICEBefore hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RRU orBBU based on the labels on both ends of the cables and determine the hoisting direction.1. After climbing up to the tower, installation engineer A secures the fixed pulley to the towerplatform support and leads the lifting sling through the fixed pulley.2. Installation engineer B places the fiber coiler for coiling fiber optic cables on the fiberspools, and installation engineer D lead the lifting sling through the stretch sling of the fiberoptic cables and use the other sling as a traction sling to secure the cables 4 m (13.12 ft)away from the lifting sling, as shown in Figure 6-7.6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.43
Figure 6-7 Binding fiber optic cables(1) Lifting sling (2) Stretch sling (3) Traction sling NOTICEDo not remove the stretch sling and protection pipe or bind fiber optic cables using onesling, as shown in Figure 6-8.Figure 6-8 Incorrect binding method 3. Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m (49.21ft) per minute to coil the fiber optic cables.4. Installation engineer C pulls the lifting sling downwards, and installation engineer D pullsthe traction sling outwards to protect the fiber optic cables from colliding with the tower.6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.44
Step 2 Secure the fiber optic cables to the tower vertically using cable clips.Step 3 Remove the lifting sling, traction sling, and protection pipe.NOTEThe procedure for hoisting the fiber optic cables onto the tower is for your reference only.----End6.3 Hoisting Power Cables onto a TowerThis section describes the procedure for hoisting power cables onto a tower and the precautionsthat must be taken.ContextCabling requirements for power cables are met. For details, see 8.1 Cabling Requirements.The procedure for adding a connector to the RRU power cable on the RRU side is done underthe tower.ProcedureStep 1 Hoist the power cables onto the tower, as shown in Figure 6-9.Figure 6-9 Hoisting power cables onto the tower(1) Lifting sling (2) Fixed pulley 6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.45
1. After climbing up to the tower, installation engineer A secures the fixed pulley to the towerplatform support and leads the lifting sling through the fixed pulley.2. Installation engineer B secures three cable ties to the power cable connector, and thensecures the power cable to the lifting sling, as shown in Figure 6-10.NOTEThe connector on the power cable in the figure is only an example. The actual connector may varyaccording to the situation.Figure 6-10 Binding cable ties 3. Installation engineer B wraps the power cable connector with a layer of PVC insulationtape, as shown in Figure 6-11.NOTEWrap the PVC insulation tape from 30 mm (1.18 in.) away from one end of the connector until itreaches the other end of the connector. The total length of the wrapped connector is 100 mm (3.94in.).6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.46
Figure 6-11 Wrapping the PVC insulation tape 4. Installation engineer C pulls the lifting sling downwards, and installation engineer B pullsthe other end of the lifting sling outwards to protect the power cables from colliding withthe tower.Step 2 Secure the power cables to the tower vertically using cable clips.Step 3 Remove the cable ties, PVC insulation tape, and lifting sling.NOTEThe procedure for hoisting the power cables onto the tower is for your reference only.----End6 Hoisting an RRU and Related Cables onto a TowerIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.47
7 Installing the RRUAbout This ChapterThis chapter describes the procedure for installing the RRU. The procedure for installing theRRU varies depending on installation options.7.1 Mounting Kits for an RRUThis section describes the bracket assembly and the attachment plate for an RRU.7.2 Installing the RRU on a PoleOne or more RRUs can be installed on a pole.7.3 Installing an RRU on U-steelThis section describes the procedure and precautions for installing an RRU on U-steel. An RRUcan be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows onlyone RRU to be installed in standard mode.7.4 Installing an RRU on Angle SteelThis section describes the procedure and precautions for installing an RRU on angle steel. AnRRU can be installed on angle steel secured on the ground or a tower. Each piece of angle steelallows only one RRU to be installed in standard mode.7.5 Installing an RRU on a WallThis section describes the procedure and precautions for installing an RRU on a wall.7.6 Installing an RRU on an IFS06This section describes the procedure and precautions for installing an RRU on an IFS06.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.48
7.1 Mounting Kits for an RRUThis section describes the bracket assembly and the attachment plate for an RRU.Figure 7-1 shows the front and side of an RRU.Figure 7-1 Front and side view of an RRU(1) Front view (2) Side view (3) Attachment plateNOTEWhen the operator faces the RRU whose handle and cabling cavity are on the right-hand side, the sidefacing the operator is the front of the RRU. Figure 7-2 shows the bracket assembly for an RRU.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.49
Figure 7-2 12 L blade RRU mounting kit(1) Plastic cap (2) Standard M10 nut (3) Spring washer (4) Thick flat washer (5) Square-neck bolt(6) Hoist clamp onthe main bracket(7) Main bracket (8) Inner hexagonscrew(9) Pole installationbracket(10) Auxiliarybracket 7.2 Installing the RRU on a PoleOne or more RRUs can be installed on a pole.7.2.1 Installing a Single RRUThis section describes the procedure and precautions for installing a single RRU on a pole.PrerequisitesBefore you install an RRU on a pole secured on a tower, the RRU and its mounting brackets arehoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.The hoist clamp on the main bracket is secured properly.NOTICElDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.50
ProcedureStep 1 Determine a position for installing the mounting brackets.lIf the RRU is installed on a tower, determine a position for installing the mounting bracketsaccording to the instructions in 3.5.1 Clearance for a Single RRU.lIf the RRU is installed on the ground, determine a position for installing the mountingbrackets according to Figure 7-3.Figure 7-3 Distance between the mounting brackets and the ground NOTEAs shown in the figure above, it is recommended that the mounting kits be installed at a position1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, onlythe 3.5 Installation Clearance Requirements of an RRU needs to be provided.Step 2 Install the RRU mounting brackets, as shown in Figure 7-4.Figure 7-4 Installing the RRU mounting brackets 7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.51
NOTEEnsure that the arrows on the mounting brackets are pointing up.1. Adjust the position of the nut and remove the square-neck bolt at the open end from theslot on the auxiliary bracket.2. Slide the mounting brackets onto the pole horizontally and insert the square-neck bolt intothe slot.Step 3 Use a 16 mm (0.63 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so thatthe mounting brackets are secured onto the pole, as shown in Figure 7-5.NOTICETighten the nuts on the two square-neck bolts simultaneously. After the main and auxiliarybrackets are secured properly, measure the spacing between the brackets on both sides and ensurethat the spacing is the same on the two sides.Figure 7-5 Securing the RRU mounting brackets Step 4 Install the RRU onto the main bracket, as shown in Figure 7-6.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.52
Figure 7-6 Installing the RRU onto the main bracket Step 5 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the topof the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plateand main bracket are firmly secured, as shown in Figure 7-7.Figure 7-7 Securing the captive screw into the connection hole ----End7.2.2 Installing Two RRUsThis section describes the procedure and precautions for installing two RRUs on a pole.PrerequisitesThe hoist clamp on the main bracket is secured properly.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.53
NOTICElDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.ProcedureStep 1 Install the first RRU onto the main bracket, as shown in Figure 7-8. For details, see 7.2.1Installing a Single RRU.Figure 7-8 Installing the first RRU onto the main bracket Step 2 Use an M6 inner hexagon screwdriver to loosen the four hex socket screws from the main bracketand pole installation brackets on the second set of mounting brackets, and remove the mainbracket, as shown in Figure 7-9.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.54
Figure 7-9 Removing the RRU main bracket(1) Main bracket (2) Pole installation bracket Step 3 Install the removed main bracket on one side of the first main bracket, as shown in Figure7-10.NOTICEThe second main bracket must be installed, with the open ends of U-shaped slots on both sidesfacing downwards.Figure 7-10 Installing the second main bracket(1) Removed main bracket NOTEThe main mounting bracket for installing a blade RRU can connect to the main mounting bracket forinstalling a common RRU in the scenarios of adding RRUs, as shown in Figure 7-11.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.55
Figure 7-11 Connect to the main mounting bracket for installing a common RRU(1) Main mounting bracket for a blade RRU (2) Main mounting bracket for a common RRU Step 4 Install the second RRU onto the main bracket, as shown in Figure 7-12.Figure 7-12 Installing the second RRU onto the main bracket NOTICEAfter installing each RRU on its main bracket, use an inner hexagon torque screwdriver to tightenthe captive screw into the holes of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.)so that the attachment plate and main bracket are firmly secured, as shown in Figure 7-137 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.56
Figure 7-13 Securing the captive screw into the connection hole Step 5 Install the sheet metal tab for fixing the neighboring RRUs, as shown in Figure 7-14.Figure 7-14 Installing the sheet metal tab(1) Screw (2) Sheet metal tab 1. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from thehandle of the second RRU and remove the screw.2. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab closer to thehandle of the second RRU. Then, rotate the sheet metal tab to align the vacant hole in thesheet metal tab with a hole on the top of the first RRU.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.57
3. Insert the removed screw into the hole on the top of the first RRU and use an M6 torquescrewdriver to tighten the screw to 5 N·m (44.25 lbf·in.).----End7.2.3 Installing Three or More RRUsThis section describes the procedure and precautions for installing three or more RRUs on apole.PrerequisitesThe hoist clamp on the main bracket is secured properly.NOTICElDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.ContextA pole supports three, four, or six RRUs. The procedures for installing them are the same. Thefollowing provides an example for the procedure of installing four RRUs on a pole.ProcedureStep 1 Install two RRUs, as shown in Figure 7-15. For detailed installation process, see 7.2.2 InstallingTwo RRUs.Figure 7-15 Two RRUs installed on a pole7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.58
Step 2 Use an M6 inner hexagon screwdriver to loosen the four hex socket screws from the main bracketand pole installation brackets on the second set of mounting brackets, and remove the mainbracket, as shown in Figure 7-16.Figure 7-16 Removing the RRU main bracket(1) Main bracket (2) Pole installation bracket Step 3 Install the third main bracket and install the third RRU onto the third main bracket. Then, usean inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of theattachment plate and main bracket for the RRU to 5 N·m (44.25 lbf·in.), as shown in Figure7-17.NOTICEThe third main bracket must be installed, with the open ends of U-shaped slots on both sidesfacing downwards.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.59
Figure 7-17 Installing the third RRU onto the third main bracket NOTEThe main mounting bracket for installing a blade RRU can connect to the main mounting bracket forinstalling a common RRU in the scenarios of adding RRUs, as shown in Figure 7-18.Figure 7-18 Connect to the main mounting bracket for installing a common RRU(1) Main mounting bracket for a blade RRU (2) Main mounting bracket for a common RRU Step 4 Install the sheet metal tab for fixing the neighboring RRUs, as shown in Figure 7-19.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.60
Figure 7-19 Installing the sheet metal tab(1) Screw (2) Sheet metal tab 1. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from thehandle of the first RRU and remove the screw.2. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab closer to thehandle of the first RRU. Then, rotate the sheet metal tab to align the vacant hole in the sheetmetal tab with a hole on the top of the third RRU.3. Insert the removed screw into the hole on the top of the third RRU and use an M6 torquescrewdriver to tighten the screw to 5 N·m (44.25 lbf·in.).Step 5 Install the second set of RRU mounting brackets at least 80 mm (3.15 in.) above or below thefirst set of RRU mounting brackets, as shown in Figure 7-20.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.61
Figure 7-20 Installing the second set of RRU mounting brackets Step 6 Install the fourth RRU onto the fourth main bracket, use an inner hexagon torque screwdriverto tighten the captive screw into the holes on the top of the attachment plate and main bracketto 5 N·m (44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, asshown in Figure 7-21.Figure 7-21 Installing the fourth RRU on the fourth main bracket7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.62
----End7.3 Installing an RRU on U-steelThis section describes the procedure and precautions for installing an RRU on U-steel. An RRUcan be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows onlyone RRU to be installed in standard mode.PrerequisitesBefore you install an RRU on U-steel secured on a tower, the RRU and its mounting bracketsare hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.The hoist clamp on the main bracket is secured properly.NOTICElDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.ContextFigure 7-22 shows the top view of an RRU installed on U-steel.NOTICEWhen the width of the narrower edges of the U-steel is less than 40 mm (1.57 in.), only the aand b modes are supported.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.63
Figure 7-22 Top view of an RRU(1) U-steel ProcedureStep 1 Determine a position for installing the mounting brackets.lIf the RRU is installed on a tower, determine a position for installing the mounting bracketsaccording to the instructions in 3.5.1 Clearance for a Single RRU.lIf the RRU is installed on the ground, determine a position for installing the mountingbrackets according to the instructions in Figure 7-23.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.64
Figure 7-23 Distance between the mounting brackets and the ground NOTEAs shown in the figure above, it is recommended that the mounting kits be installed at a position1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, onlythe 3.5 Installation Clearance Requirements of an RRU needs to be provided.Step 2 Install the RRU mounting brackets, as shown in Figure 7-24.Figure 7-24 Installing the RRU mounting brackets NOTEEnsure that the arrows on the mounting brackets are pointing up.1. Adjust the position of the nut and remove the square-neck bolt at the open end from theslot on the auxiliary bracket.2. Slide the mounting brackets onto the U-steel horizontally and insert the square-neck boltinto the slot.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.65
Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so thatthe mounting brackets are secured onto the U-steel, as shown in Figure 7-25.NOTICETighten the nuts on the two square-neck bolts simultaneously. After the main and auxiliarybrackets are secured properly, measure the spacing between the brackets on both sides and ensurethat the spacing is the same on the two sides.Figure 7-25 Securing the RRU mounting brackets Step 4 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of theRRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screwsto 5 N·m (44.25 lbf·in.), as shown in Figure 7-26.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.66
Figure 7-26 Installing the attachment plate onto the rear of the RRU Step 5 Install the RRU onto the main bracket, as shown in Figure 7-27.Figure 7-27 Installing the RRU onto the main bracket Step 6 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the topof the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plateand main bracket are firmly secured, as shown in Figure 7-28.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.67
Figure 7-28 Securing the captive screw into the connection hole ----End7.4 Installing an RRU on Angle SteelThis section describes the procedure and precautions for installing an RRU on angle steel. AnRRU can be installed on angle steel secured on the ground or a tower. Each piece of angle steelallows only one RRU to be installed in standard mode.PrerequisitesBefore you install an RRU on U-steel secured on a tower, the RRU and its mounting bracketsare hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.The hoist clamp on the main bracket is secured properly.NOTICElDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.ContextFigure 7-29 shows the top view of an RRU installed on angle steel.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.68
Figure 7-29 Top view of an RRU(1) Angle steel ProcedureStep 1 Determine a position for installing the mounting brackets.lIf the RRU is installed on angle steel secured on a tower, determine a position for installingthe mounting brackets according to the instructions in 3.5.1 Clearance for a SingleRRU.lIf the RRU is installed on angle steel secured on the ground, determine a position forinstalling the mounting brackets according to Figure 7-30.Figure 7-30 Distance between the mounting brackets and the ground NOTEAs shown in the figure above, it is recommended that the mounting kits be installed at a position1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, onlythe 3.5 Installation Clearance Requirements of an RRU needs to be provided.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.69
Step 2 Install the RRU mounting brackets, as shown in Figure 7-31.Figure 7-31 Installing the RRU mounting brackets NOTEEnsure that the arrows on the mounting brackets are pointing up.1. Adjust the position of the nut and remove the square-neck bolt at the open end from theslot on the auxiliary bracket.2. Slide the mounting brackets onto the angle steel horizontally and insert the square-neckbolt into the slot.Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so thatthe mounting brackets are secured onto the angle steel, as shown in Figure 7-32.NOTICETighten the nuts on the two square-neck bolts synchronously. After the main and auxiliarybrackets are secured properly, measure the spacing between the brackets on both sides and ensurethat the spacing is the same on the two sides.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.70
Figure 7-32 Securing the RRU mounting brackets Step 4 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of theRRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screwsto 5 N·m (44.25 lbf·in.), as shown in Figure 7-33.Figure 7-33 Installing the attachment plate onto the rear of the RRU Step 5 Install the RRU onto the main bracket, as shown in Figure 7-34.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.71
Figure 7-34 Installing the RRU onto the main bracket Step 6 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the topof the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plateand main bracket are firmly secured, as shown in Figure 7-35.Figure 7-35 Securing the captive screw into the connection hole ----End7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.72
7.5 Installing an RRU on a WallThis section describes the procedure and precautions for installing an RRU on a wall.PrerequisitesThe hoist clamp on the main bracket is secured properly.NOTICElDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.ContextThe wall on which RRUs are installed must meet the following requirements:lFor each RRU, the wall must be able to bear a weight four times heavier than the RRU'sweight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.lExpansion bolts must be tightened to 30 N·m to ensure that the bolts work properly and thewall remains intact.ProcedureStep 1 Disassemble the RRU mounting brackets, as shown in Figure 7-36.Figure 7-36 Disassembling the RRU mounting brackets(1) Main bracket (2) Square-neck bolt (3) Pole installation bracket (4) Auxiliary bracket(5) Flat washer (6) Spring washer (7) Nut (8) Plastic screw cap7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.73
1. Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws onthe pole installation bracket, and remove the main bracket from the pole installation bracket.2. Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and removethe plastic screw cap, nuts, spring washers, flat washers, square-neck bolts, and poleinstallation bracket from the auxiliary bracket.Step 2 Place the pole installation bracket against the wall, use a level to verify that the pole installationbracket is placed horizontally, and then mark anchor points with a marker, as shown in Figure7-37.Figure 7-37 Marking anchor points(1) Level (2) Pole installation bracket (3) RRU NOTEAs shown in the figure above, it is recommended that the pole installation bracket be installed at a position1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only the3.5 Installation Clearance Requirements of an RRU needs to be provided.Step 3 Drill holes at the anchor points, and then insert expansion anchor bolts, as shown in Figure7-38.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.74
Figure 7-38 Drilling holes and inserting expansion anchor bolts(1) M10×80 bolt (2) Nut (3) Spring washer (4) Flat washer (5) Expansion sleeve 1. Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points withthe depth ranging from 55 mm (2.17 in.) to 60 mm (2.36 in.), use a vacuum cleaner to clearthe dust out from inside and around the holes, and measure the distances between holes. Ifany of the hole is beyond the acceptable range, mark a new anchor point and drill a newhole.NOTICETake proper safety measures to protect your eyes and respiratory tract against the dustbefore drilling holes.2. Tighten the expansion anchor bolts slightly and place one vertically into each hole.3. Use a rubber mallet to pound the expansion anchor bolt until it goes into the hole completely.4. Tighten and then loosen the expansion bolt, and remove the M10 bolt, spring washer, andflat washer in sequence.NOTICEAfter dismantling an expansion anchor bolt, ensure that the top of the expansion sleeve ison the same level as the wall. Otherwise, the device cannot be installed on the wall evenlyand securely.Step 4 Install the pole installation bracket on the expansion anchor bolts, place the flat washers, springwashers, and nuts through the expansion anchor bolts in sequence, and then use a 16 mm (0.63in.) torque socket to tighten the nuts to 30 N·m (265.52 lbf·in.), as shown in Figure 7-39.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.75
Figure 7-39 Installing the pole installation bracket on the expansion anchor bolts NOTICEEnsure that the arrows on the pole installation bracket are pointing up.Step 5 Install the main bracket onto the pole installation bracket using four M6x16 inner hexagonscrews, and use an inner hexagon torque screwdriver to tighten the inner hexagon screws to 5N·m (44.25 lbf·in.) so that the main bracket and pole installation bracket are firmly secured, asshown in Figure 7-40.Figure 7-40 Installing the main bracket7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.76
(1) Main bracket (2) Pole installation bracketStep 6 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of theRRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screwsto 5 N·m (44.25 lbf·in.), as shown in Figure 7-41.Figure 7-41 Installing the attachment plate onto the rear of the RRU Step 7 Install the RRU onto the main bracket, as shown in Figure 7-42.Figure 7-42 Installing the RRU onto the main bracket7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.77
Step 8 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the topof the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plateand main bracket are firmly secured, as shown in Figure 7-43.Figure 7-43 Securing the captive screw into the connection hole ----End7.6 Installing an RRU on an IFS06This section describes the procedure and precautions for installing an RRU on an IFS06.PrerequisitesThe hoist clamp on the main bracket is secured properly.NOTICElDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damageduring the installation.ContextlThe upper and lower adjustable beams on an IFS06 can be moved up and down to fit forheights of RRUs.lRRUs can be installed on an IFS06 when the ambient temperature is higher than or equalto the lowest operating temperature of the RRUs and at least 5°C (41°F) lower than the7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.78
highest working temperature of the RRU. In this scenario, the IFS06 supports at least threeRRUs. The IFS06 supports a maximum of six RRUs when the ambient temperature is higherthan or equal to the lowest operating temperature of the RRUs and at least 10°C (50°F)lower than the highest operating temperature of the RRU.NOTEFor details about the operating temperature of the RRUs, see section "Technical Specifications ofRRUs" in 3900 Series Base Station Technical Description.lInstall RRUs in the sequence from bottom to top and from left to right.lThis section describes how to install an RRU in height-unrestricted scenarios. Theprocedure for installing an RRU in height-restricted scenarios is the same as that in height-unrestricted scenarios.lWhen installing the pole installation bracket, you need to use the M10x50 bolts deliveredwith the IFS06.lRubber washers are easily compressed or broken, whereas do not need to be replaced.ProcedureStep 1 Disassemble the RRU mounting brackets, as shown in Figure 7-44.Figure 7-44 Disassembling the RRU mounting brackets(1) Main bracket (2) Square-neck bolt (3) Pole installation bracket (4) Auxiliary bracket(5) Flat washer (6) Spring washer (7) Nut (8) Plastic screw cap 1. Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws onthe pole installation bracket, and remove the main bracket from the pole installation bracket.2. Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and removethe plastic screw cap, nuts, spring washers, flat washers, square-neck bolts, and poleinstallation bracket from the auxiliary bracket.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.79
Step 2 Use the M10x50 bolts delivered with the IFS06 to secure the pole installation bracket to theIFS06, and then use an M10 torque socket wrench to secure the bolts to 30 N·m (265.52 lbf·in.).NOTICEEnsure that the arrows on the pole installation bracket are pointing up.Install the pole installation bracket, as shown in Figure 7-45.Figure 7-45 Installing the pole installation bracket in height-unrestricted scenarios(1) Spring washer (2) Rubber washerStep 3 Attach the main bracket to the pole installation bracket, and use an inner hexagon screwdriverto tighten four M6x16 screws to 5 N·m (44.25 lbf·in.) so that the main bracket and poleinstallation bracket are firmly secured, as shown in Figure 7-46.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.80
Figure 7-46 Installing the main bracket(1) Main bracket (2) Pole installation bracket Step 4 Attach the RRU to the main bracket, and then use an inner hexagon screwdriver to tighten thecaptive screw into the holes of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) sothat the attachment plate and main bracket are firmly secured, as shown in Figure 7-47.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.81
Figure 7-47 Installing the RRU onto the main bracket Step 5 Install the RRUs on the lower level from left to right, as shown in Figure 7-48.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.82
Figure 7-48 Installing RRUs on the lower level Step 6 Optional: Optional: When the ambient temperature is equal to or higher than the lowestoperating temperature of the RRU and at least 10°C (10°F) lower than the highest operatingtemperature of the RRU, repeat the preceding steps to install the RRUs on the higher level, asshown in Figure 7-49.7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.83
Figure 7-49 Installing RRUs on the higher level----End7 Installing the RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.84
8 Installing RRU CablesAbout This ChapterThis chapter describes the procedure for installing RRU cables.8.1 Cabling RequirementsCables must be laid out according to the specified cabling requirements to prevent signalinterference.8.2 RRU Cable ConnectionsThis section describes RRU cable connections.8.3 Installing RRU CablesThis chapter describes the procedure for installing RRU cables.8.4 RRU CablesThis section describes RRU cable connections.8.5 Installing an RRU PGND CableThis section describes the procedure for installing an RRU PGND cable.8.6 Installing an RRU RF JumperThis section describes the procedure for installing an RRU RF jumper.8.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension CableThis section describes the procedures for installing an RRU AISG multi-wire cable and AISGextension cable.8.8 Installing an RRU Alarm CableThis section describes the procedure for installing an RRU alarm cable.8.9 Opening the Cover Plate of an RRU Cabling CavityThis section describes the procedure for opening the cover plate of an RRU cabling cavity.8.10 Installing a CPRI Optical CableThis section describes the procedure for installing a CPRI optical cable.8.11 Installing an RRU Power CableThis section describes the procedure for installing an RRU power cable.8.12 Closing the Cover Plate of an RRU Cabling Cavity8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.85
This section describes the procedure for closing the cover plate of an RRU cabling cavity.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.86
8.1 Cabling RequirementsCables must be laid out according to the specified cabling requirements to prevent signalinterference.NOTEIf a cable listed below is not required, skip the cabling requirements of the cable.General Cabling RequirementsBending radius requirementslThe bending radius of a 7/8'' feeder must be greater than 250 mm (9.84 in.), and the bendingradius of a 5/4'' feeder must be greater than 380 mm (14.96 in.).lThe bending radius of a 1/4'' jumper must be greater than 35 mm (1.38 in.). The bendingradius of a super-flexible 1/2'' jumper must be greater than 50 mm (1.97 in.), and the bendingradius of an ordinary 1/2'' jumper must be greater than 127 mm (5 in.).lThe bending radius of a power cable or PGND cable must be at least three times its diameter.lThe bending radius of a fiber optic cable is at least 20 times of its diameter, and the bendingradius of a breakout cable is at least 30 mm (1.18 in.).lThe bending radius of an E1/T1 cable must be at least three times its diameter.lThe bending radius of a signal cable must be at least five times its diameter.Cable binding requirementslCables of the same type must be bound together.lDifferent types of cables must be separately laid out and bound, with a minimum distanceof 30 mm (1.18 in.) from each other.lThe cables must be bound tightly and neatly. The sheaths of the cables must not be damaged.lThe cable ties must face the same direction, and those at the same horizontal line must bein a straight line.lThe excess of the indoor cable ties is cut off. The excess of 5 mm (0.197 in.) of the outdoorcable ties is reserved, and the cut surfaces are smooth without sharp edges.lAfter cables are installed, labels or nameplates must be attached to the cables at their ends,curves, and interconnection positions.Security requirementslWhen routing cables, avoid sharp objects, for example sharp edges on the wall. If necessary,use tubes to protect the cables.lWhen routing cables, keep the cables away from heat sources and use heat insulationmaterials to insulate the cables from the heat sources.lReserve a proper distance (0.1 m or 3.937 in. is recommended) between equipment andcables especially at the cable curves to protect the cables and equipment.Indoor cabling requirementslRoute each cable into the room through the feeder window.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.87
lReserve drip loops for all cables outside the feeder window before routing them into theroom. Ensure that the radiuses of the drip loops are greater than or equal to the minimumbending radiuses of the cables.lWhen routing a cable into the room, ensure that a person is assisting you in the room.lApply waterproof treatment to the feeder window.Outdoor Cabling RequirementslAfter being connected to a ground clip on power cables, a ground cable must be routeddownwards to prevent water from entering the equipment to which the power cablesconnect.lProtect outdoor cables against potential damage. For example, put the cables through tubes.lThe cables to be protected include AC power cables, transmission cables, and cables laidout underground.lWhen routing cables through tubes on the ground below the cabinet, put a 30 mm to 50mm (1.18 in. to 1.97 in.) length of the tubes into the base of the cabinet but do not put thetubes into the cabinet. Use waterproof tape or waterproof silicon gel to block both ends ofthe tubes and use sheet metal tabs to secure the tubes to the cable holes in the base.lWhen routing cables through tubes along a metal cable trough below the cabinet, do notput the tubes into the base of the cabinet but cover the cable trough and connect the tubesto the cable holes in the base.lWhen routing RRU cables, ensure that the highest positions of the routes of all RRU cables(except RF cables and AISG cables) must be lower than the bottom of the RRU.lUse clips to secure cables outdoors. For the method of installing a clip, see the installationguide delivered with the clip.lArrange cables neatly along the routing direction and use clips to secure the cables.lDetermine the positions where the clips are installed according to the actual situation. Forexample, 7/8" feeders are secured with clips at an interval of 1.5 m to 2 m (4.92 ft to 6.56ft), CPRI fiber optic cables and power cables are secured with clips at an interval of 1 mto 1.5 m (3.28 ft to 4.92 ft). Ensure that the clips are evenly spaced and in the same direction.lWhen fastening cables with a clip, ensure that the cables are aligned neatly and are routedthrough the holes in the clip. Do not stretch the cables too tightly.NOTEThere are two types of clips: 3-hole clip and 6-hole clip, which are described as follows:lA 3-hole clip is shown by illustration a in the following figure. It is often used to fasten feeders.lA 6-hole clip is shown by illustration b in the following figure. It is often used to fasten power cables andCPRI fiber optic cables.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.88
Figure 8-1 Exterior of the clips(1) Cable hole for feeders (2) Cable hole for fiber optic cables (3) Cable hole for power cables The following figure shows the cables secured on a cable tray.Figure 8-2 Cables secured on a cable tray(1) 3-hole clip (2) 6-hole clip The following figure shows the cables secured on a tower.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.89
Figure 8-3 Cables secured on a tower(1) 3-hole clip (2) 6-hole clip Special Cabling RequirementsCabling of power cableslPower cables must be installed in the position specified in engineering design documents.lIf the length of power cables is insufficient, replace the cables rather than adding connectorsor soldering joints to lengthen the cables.lCables can only be laid out under well-planned instructions. The cabling activities of fiberoptic cables are allowed only when qualified personnel and communication facilities areavailable.lDo not circle and twist cables.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.90
lAfter routing a DC power cable onto the platform on a tower, route it along the shortestpath to the rails surrounding the platform, and route it along the inside of the rails.lAfter routing a DC power cable close to the equipment on a tower, use clips to secure thepower cable onto a pole or the rails surrounding the platform. Ensure that there is noexcessively long distance between the equipment and the position where the power cableis secured.Cabling of PGND cableslPGND cables for a base station must be connected to the same group of ground bars.lPGND cables must be buried in the ground or routed indoors.lThe external conductor of the coaxial wire and the shield layer of the shielded cable musthave proper electrical contact with the metal surface of the equipment to which they areconnected.lPGND cables and signal cables must be installed separately. A certain distance must bereserved between them to prevent interference from each other.lSwitches or fuses must not be installed on the PGND cables.lOther devices must not be used for electrical connections of the PGND cables.lAll the metal parts in the housing of the equipment must be reliably connected to the groundterminal.Cabling of E1 cableslE1 cables must not cross power cables, PGND cables, or RF cables when laid out. Iftransmission cables are laid out with power cables, PGND cables, or RF cables in parallel,the spacing between them must be greater than 30 mm (1.18 in.).lE1 cables are lined up straight and bound neatly with cable ties.lSufficient slack is provided for E1 cables at turns.lE1 cables must not be pressed by the door of the cabinet when routed, as shown in thefollowing figure.Figure 8-4 E1 cables routed in the cabinet Cabling of fiber optic cables8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.91
lAt least three people are required for laying out fiber optic cables. The cabling activitiesof fiber optic cables are allowed only when qualified personnel and communicationfacilities are available.lThe operating temperature of fiber optic cables ranges from -40ºC to +60ºC (-40ºF to+140ºF). If the actual temperature is beyond this range, take protective measures or selectanother route.lDo not circle and twist cables.lDo not bind a fiber optic cable at the position where it bends.lDo not stretch, step on, or place heavy objects on fiber optic cables. Keep the fiber opticcables away from sharp objects.lWhen fiber optic cables are routed, the excess of the fiber optic cables must be coiled aroundspecial devices, such as a fiber coiler.lAn unarmored fiber optic cable must be bound using binding straps. If a fiber optic patchcord needs to be secured in a cabinet or a piece of equipment, use binding straps to bind itand then use cable ties to secure the binding straps to the cabinet or equipment. Ensure thatthe fiber optic cables can flexibly move in the cable ties. Do not bend the fiber optic cablessharply. The following figure shows how to bind the fiber optic cables correctly.Figure 8-5 Binding fiber optic cables lWhen coiling fiber optic cables, apply even strength. Do not bend the fiber optic cableswith force.lUnused optical connectors must be covered with dustproof caps.lThe fiber optic cables must not be pressed by the door of the cabinet when routed, as shownin the following figures.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.92
Figure 8-6 CPRI fiber optic cables routed in the cabinet (1) Figure 8-7 CPRI fiber optic cables routed in the cabinet (2) Figure 8-8 FE/GE fiber optic cables routed in the cabinet lAfter routing a fiber optic cable onto the platform on a tower, route it along the shortestpath to the rails surrounding the platform, and route it along the inside of the rails.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.93
lAfter routing a fiber optic cable close to the equipment on a tower, use clips to secure thefiber optic cable onto a pole or the rails surrounding the platform. Ensure that there is noexcessively long distance between the equipment and the position where the cable issecured.lCoil the excess of the fiber optic cables near the equipment on the tower before securingthe cables on the tower.8.2 RRU Cable ConnectionsThis section describes RRU cable connections.NOTEThe RRU does not support power cable cascading.Figure 8-9 shows the cable connections of a single-mode RRU.Figure 8-9 Cable connections of a single-mode RRU(1) RRU PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable(4) RRU AISG extension cable (5) RRU power cable (6) CPRI optical fiber(7) RRU alarm cable - - Figure 8-10 shows the cable connections of a multimode RRU.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.94
Figure 8-10 Cable connections of a multimode RRU(1) RRU PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable(4) RRU AISG extension cable (5) RRU power cable (6) CPRI optical fiber(7) RRU alarm cable - - Figure 8-11 shows the cable connections of multiple single-mode RRUs.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.95
Figure 8-11 Cable connections of multiple single-mode RRUs(1) RRU PGND cable (2) RRU RF jumper (3) RRU power cable(4) CPRI optical fiber - - Figure 8-12 shows the cable connections of multiple multimode RRUs.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.96
Figure 8-12 Cable connections of multiple multimode RRUs 8.3 Installing RRU CablesThis chapter describes the procedure for installing RRU cables.Figure 8-13 shows the procedure for installing RRU cables.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.97
Figure 8-13 Procedure for installing RRU cables 8.4 RRU CablesThis section describes RRU cable connections.Table 8-1 lists RRU cables.Table 8-1 RRU cablesCable One End The Other EndConnector InstallationPositionConnector InstallationPositionRRU PGNDCableOT terminal(M6, 16 mm2 or0.025 in.2)Groundterminal on theRRUOT terminal(M8, 16 mm2 or0.025 in.2)Ground terminalon the groundbar8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.98
Cable One End The Other EndConnector InstallationPositionConnector InstallationPositionRRU PowerCableTool-less femaleconnector(pressfit type)NEG(-) andRTN(+) portson the RRUDepending onthe powersupplyequipmentExternal powerequipmentRRU AlarmCableDB15 maleconnectorEXT_ALMport on theRRUCord endterminalExternal alarmdeviceCPRI FiberOptic CableDLC connector CPRI0 port onthe RRUDLC connector CPRI port on aboard in theBBURRU RF Jumper 4.3-10 straightmale connectorRF ports on theRRU4.3-10 straightmale connectorAntenna systemRRU AISGMulti-WireCableDB9 waterproofmale connectorRET port onthe RRUStandard AISGfemaleconnectorStandard AISGmale connectoron the RCU or onthe AISGextension cableRRU AISGExtension CableStandard AISGmale connectorStandardAISG femaleconnector onthe AISGmulti-wirecableStandard AISGfemaleconnectorStandard AISGmale connectoron the RCU 8.5 Installing an RRU PGND CableThis section describes the procedure for installing an RRU PGND cable.ContextThe cross-sectional area of an RRU PGND cable is 16 mm2 (0.025 in.2). The cable has an M6OT terminal at one end and an M8 terminal at the other end.DANGERInstall RRU PGND cables by strictly following the following operations. Otherwise, damage tothe RRU or personal injury may occur.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.99
ProcedureStep 1 According to the actual cable route, cut the PGND cable into a proper length to prepare an RRUPGND cable. Then, add an OT terminal at each end of the cable according to the instructions inAssembling the OT Terminal and the Power Cable.Step 2 Install the RRU PGND cable.Connect the M6 OT terminal of the RRU PGND cable to a ground terminal at the RRU bottomand the M8 OT terminal to the external ground bar, as shown in Figure 8-14.Figure 8-14 Installing an RRU PGND cable (1) Ground terminal 1 (2) Ground terminal 2NOTElSelect a ground terminal according to site conditions. When RRUs are installed in standard mode,ground terminal 1 is recommended, as shown in A of Figure 8-14. When RRUs are installed in side-mounted mode, ground terminal 2 is recommended, as shown in B of Figure 8-14.lWhen the RRU PGND cable uses OT terminals with two holes, use two screws to tighten the OTterminals. Therefore, when installing a PGND cable on a ground terminal, remove the screws on theother ground terminal before installing the RRU.lCrimp OT terminals in correct positions, as shown in Figure 8-15.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.100
Figure 8-15 Correct position of an OT terminal Step 3 Label the installed cable according to the instructions in Attaching a Cable-Tying Label.----End8.6 Installing an RRU RF JumperThis section describes the procedure for installing an RRU RF jumper.ProcedureStep 1 Connect the 4.3-10 straight male connector on the RRU RF jumper to the antenna port, and usea torque wrench to tighten the connector to 5 N·m (44.25 lbf·in.), as shown in Figure 8-16.Figure 8-16 Installing an RRU RF jumper 8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.101
NOTICEOn AC-powered electric railways, such as high-speed railways, when leaky cables are connectedto RRUs installed in tunnels, high-voltage-resistance DC blocks must be installed between RRURF jumpers and the leaky cables to protect the RRUs against damage.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 8-17.Figure 8-17 Waterproofing a connector of the RF jumper (1) Waterproof tape (2) PVC insulation tapeNOTElBefore wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice itsoriginal length.lDo not stretch the PVC insulation tape when wrapping the PVC insulation tape.lWrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlapsmore than 50% of the preceding layer. Ensure that neighboring layers are stuck to each other.lEnsure that the adhesive surface of the tape overlaps the lower layer.lWhen cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).1. Wrap three layers of waterproof tape on the connector, first from bottom up, then from topdown, and finally from bottom up. Start wrapping the connector at a position 50 mm (1.97in.) away below the bottom of the connector to the top of the connector, first from bottom8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.102
up, then from top down, and finally from bottom up. Cut off the redundant tape after threelayers are wrapped. Wrap each layer of tape around the connector tightly.2. Wrap three layers of PVC insulation tape. Start the wrapping at a position 30 mm (1.18 in.)away below the bottom of the waterproof tape to the top of the connector, first from bottomup, then from top down, and finally from bottom up. Cut off the redundant tape after threelayers are wrapped. Wrap each layer of tape around the connector tightly.3. Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) awayfrom one end of the PVC insulation tape.Step 4 Check the dustproof caps on antenna connectors. In outdoor scenarios, dustproof caps must bewaterproofed, as shown in Figure 8-18.NOTICEDo not remove dustproof caps from vacant antenna connectors.Figure 8-18 Waterproofing a dustproof cap(1) Dustproof cap (2) Waterproof tape (3) PVC insulation tapeNOTElBefore wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice itsoriginal length.lDo not stretch the PVC insulation tape when wrapping the PVC insulation tape.lWrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlapsmore than 50% of the preceding layer. Ensure that neighboring layers are stuck to each other.lEnsure that the adhesive surface of the tape overlaps the lower layer.lWhen cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.). 1. Verify that dustproof caps are not removed.2. Wrap three layers of waterproof tape on the connector, first from bottom up, then from topdown, and finally from bottom up. Wrap each connector with three layers of waterprooftape, from bottom up, then from top down, and finally from bottom up. Do not cut the tapeuntil all the three layers of the tape are already wrapped. Cut off the redundant tape afterthree layers are wrapped. Wrap each layer of tape around the connector tightly.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.103
3. Wrap three layers of PVC insulation tape. Wrap each connector with three layers ofwaterproof tape, from bottom up, then from top down, and finally from bottom up. Do notcut the tape until all the three layers of the tape are already wrapped. Cut off the redundanttape after three layers are wrapped. Wrap each layer of tape around the connector tightly.4. Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) awayfrom one end of the PVC insulation tape.Step 5 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cableties to bind the cables.Step 6 Label the installed cables according to the instructions in Attaching a Sign Plate Label.Step 7 Attach color-coding to the installed RF jumper according to the instructions in Attaching theColor Ring.----End8.7 Installing an RRU AISG Multi-Wire Cable and AISGExtension CableThis section describes the procedures for installing an RRU AISG multi-wire cable and AISGextension cable.ContextWhen the distance between an RRU and a Remote Control Unit (RCU) is longer than 5 m (16.4ft.), an AISG multi-wire cable is not long enough to connect the RRU and the RCU. In this case,an AISG extension cable is used to extend the AISG multi-wire cable.ProcedurelInstall an AISG multi-wire cable that is not configured with an AISG extension cable.1. Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RETport and remove the dustproof cap.2. Link the waterproofed DB9 connector at one end the AISG multi-wire cable to theRET port on the RRU bottom, as shown in Figure 8-19.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.104
Figure 8-19 Installing an RRU AISG multi-wire cable 3. Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproofDB9 connector to 0.4 N·m (3.54 lbf·in.).4. Connect the other end of the cable to the standard AISG male connector on the RCU.5. Route the cables according to the instructions in 8.1 Cabling Requirements, and thenuse cable ties to bind the cables.6. Label the installed cables according to the instructions in Attaching an L-ShapedLabel.lInstall an AISG multi-wire cable that is configured with an AISG extension cable.1. Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RETport and remove the dustproof cap.2. Link the waterproofed DB9 connector at one end of the AISG multi-wire cable to theRET port on the RRU bottom, and link the other end to the standard AISG maleconnector of the AISG extension cable, as shown in Figure 8-20.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.105
Figure 8-20 Installing an RRU AISG multi-wire cable 3. Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproofDB9 connector to 0.4 N·m (3.54 lbf·in.).4. Connect the other end of the AISG extension cable to the standard AISG maleconnector on the RCU, as shown in Figure 8-21.Figure 8-21 Installing an RRU AISG extension cable8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.106
5. Route the cables according to the instructions in 8.1 Cabling Requirements and thenuse cable ties to bind the cables.6. Label the installed cables according to the instructions in Attaching an L-ShapedLabel.----End8.8 Installing an RRU Alarm CableThis section describes the procedure for installing an RRU alarm cable.ProcedureStep 1 Use an M3 Phillips screwdriver to loosen the screws on the dustproof cap on the EXT_ALMport and remove the dustproof cap.Step 2 Connect the waterproof DB15 connector at one end of the RRU alarm cable to theEXT_ALM port on the RRU, as shown in Figure 8-22.Figure 8-22 Installing an RRU alarm cable NOTEInstall the waterproof DB15 male connector on the RRU alarm cable with caution, preventing the pin assignmentfrom being damaged.Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB15 maleconnector to 0.4 N·m (3.54 lbf·in.).8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.107
Step 4 Connect the eight cord end terminals at the other end to external alarm devices.NOTElRemove insulated protective tubes from the cord end terminals before connecting the cord end terminals todevices, as shown in Figure 8-23.lUse insulating adhesive tapes to wrap cord end terminals that are not in use and fix them at a proper positionbased on the onsite situations. This prevents false alarm reporting and equipment damage due to contact ofexposed cables. Figure 8-24 shows the method for handling cord end terminals not in use.Figure 8-23 Removing insulated protective tubes from the cord end terminals Figure 8-24 Method for handling cord end terminals that are not in use Step 5 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cableties to bind the cables.Step 6 Label the installed cables according to the instructions in Attaching an L-Shaped Label.----End8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.108
8.9 Opening the Cover Plate of an RRU Cabling CavityThis section describes the procedure for opening the cover plate of an RRU cabling cavity.ProcedureStep 1 Wear ESD gloves.NOTICETake proper ESD protection measures, for example, wear ESD gloves, to prevent electrostaticdamage to the boards, modules, or electronic components.Step 2 Use an M4 Phillips screwdriver to rotate the locking screw on the cover plate on the cablingcavity 90 degrees and pull the handle outwards to open the RRU cabling cavity, as shown inFigure 8-25.Figure 8-25 Opening the cover plate of the RRU cabling cavity(1) Locking screw Figure 8-26 shows the internal structure of the cabling cavity.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.109
Figure 8-26 RRU cabling cavity(1) Cover plate of the cabling cavity (2) Cabling cavity (3) Label for preparing the power cable(4) Cable clip (5) Power cable trough (6) Waterproof block(7) Optical cable trough - - Step 3 Remove the waterproof block.NOTERemove only the waterproof blocks for the cables to be installed.----End8.10 Installing a CPRI Optical CableThis section describes the procedure for installing a CPRI optical cable.PrerequisitesBefore the installation, single-mode optical modules can be distinguished from multimodeoptical modules in either of the following ways:lSM and MM labels on an optical module: SM indicates a single-mode optical module, andMM indicates a multimode optical module.lColor of the puller on an optical module: Blue indicates a single-mode optical module, andblack or gray indicates a multimode optical module.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.110
NOTICEThe optical modules to be installed must match CPRI rates.ContextlA CPRI optical cable transmits CPRI signals between a BBU and an RRU.ProcedureStep 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on theRRU and the other optical module into the CPRI port on the BBU, and raise the pullers, as shownin Figure 8-27.Figure 8-27 Installing an optical moduleNOTICEThe performance of an optical module that is exposed to the air for more than 20 minutes maybe abnormal. Therefore, you must insert an fiber optic cable into an unpacked optical modulewithin 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 8-28.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.111
Figure 8-28 Installing a CPRI optical cableNOTICETo avoid any damage to optical cables, the cables connected to the RRU must be installedaccording to the installation process. For details about the installation process, see 8.3 InstallingRRU Cables.Step 3 Connect the end labeled 2A and 2B of the optical cable to the optical module on the BBU side.Step 4 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cableties to bind the cables.Step 5 Label the installed cables according to the instructions in Attaching an L-Shaped Label.----End8.11 Installing an RRU Power CableThis section describes the procedure for installing an RRU power cable.PrerequisiteslA tool-less female connector (pressfit type) is added to the RRU power cable on the RRUside. For details, see 11.1 Adding a Tool-Less Female Connector (Pressfit Type) to theRRU Power Cable on the RRU Side.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.112
lA connector or OT terminals are added to the RRU power cable on the power device side.For details, see DBS3900 Installation Guide.ContextIf a power device provided by the customer is used, the recommended specification of the circuitbreaker on this power device is 20 A to 30 A.Table 8-2 describes the RRU power cable.Table 8-2 RRU power cableCable On the RRUSideOn thePowerDevice SidePowerDeviceColorRRUpowercableTool-less femaleconnector(pressfit type)Tool-lessfemaleconnector(pressfit type)EPU A cable with a black jacket and twowires insidelNorth American standards: TheRTN(+) wire is black and theNEG(-) wire is blue.lEuropean standards: The RTN(+) wire is brown and the NEG(-) wire is blue.DCDU-11BEPC5connectorDCDU-12B CAUTIONlBefore installing the RRU power cable, ensure that the upper-level circuit breaker isswitched off and the power cable has no voltage.lA drip loop is required for the position between the RRU port and the cable, preventingrain from damaging the RRU.lWhen installing the RRU power cable, connect the power cable to the RRU connector firstand then to the power equipment connector. Incorrect connection sequence or reverseconnection of positive and negative poles may damage the RRU or cause personal injury.ProcedureStep 1 Connect the tool-less female connector (pressfit type) at one end of the RRU power cable to thepower supply socket on the RRU, as shown in Figure 8-29.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.113
Figure 8-29 Installing an RRU power cable NOTICEEnsure 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 positionon the power device.NOTElA DCDU-11B/DCDU-12B can supply power to a maximum of six RRUs. Ensure that the RRU powercable is connected to one of LOAD0 to LOAD5 ports on the DCDU-11B/DCDU-12B.lOne EPU can supply power to a maximum of six RRUs. Ensure that the RRU power cable is connectedto one of RRU0 to RRU5 ports on the EPU.lWhen the RRU power cable is connected to the EPU, the blue core wire in the tool-less female connector(pressfit type) is connected to the upper port on the EPU, and the black/brown core wire is connectedto the lower port on the EPU.Step 3 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cableties to bind the cables.Step 4 Label the installed cables according to the instructions in Attaching a Cable-Tying Label.----End8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.114
8.12 Closing the Cover Plate of an RRU Cabling CavityThis section describes the procedure for closing the cover plate of an RRU cabling cavity.ProcedureStep 1 Fasten the cables using clips, as shown in Figure 8-30.NOTICEEnsure that the exposed shield layer of the power cable is properly tightened using the clip.Figure 8-30 Fastening cables using clips Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure8-31.NOTICEEnsure that cables and waterproof blocks are properly inserted into troughs.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.115
Figure 8-31 Correct placement of waterproof blocks Step 3 Push the handle to close the cover plate on the cabling cavity and use an M4 torque screwdriverto rotate the locking screw on the cover plate on the cabling cavity 90 degrees to ensure that thecover plate is locked, as shown in Figure 8-32.NOTICEThe RRU cabling cavity must be securely tightened to prevent water.8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.116
Figure 8-32 Closing the cover plate of an RRU cabling cavity Step 4 Take off the ESD gloves, and pack up all the tools.----End8 Installing RRU CablesIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.117
9 Checking the RRU Hardware InstallationAfter an RRU is installed, check the hardware installation.Table 9-1 provides the checklist for the RRU hardware installation.Table 9-1 Checklist for the RRU hardware installationSN Item1The position for each device conforms to the engineering drawing and meets thespace requirement. Sufficient space is reserved for equipment maintenance.2 The RRU is securely installed.3 The cover plate is securely installed on the RRU cabling cavity.4 Waterproof blocks are securely installed in vacant cable troughs of the RRU cablingcavity, and the cover plate for the cabling cavity is securely installed. In addition,vacant RF ports are covered with dustproof caps and the caps are tightened.5 There are no connectors or joints on each power cable or PGND cable.6 The terminals at two ends of each power cable or PGND cable are securely solderedor crimped.7 None of power cables and PGND cables can be short-circuited or reverselyconnected. In addition, these cables are not damaged or broken.8 Power cables and PGND cables are separately bound from other cables.9 The protection grounding of the RRU and the surge protection grounding of thebuilding share one group of ground conductors.10 The connectors of each signal cable are intact and securely linked, and these cablesare not damaged or broken.11 Labels are correct, legible, and complete at both ends of each cable, feeder, andjumper.12 All ground cables are properly grounded.9 Checking the RRU Hardware InstallationIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.118
10 Powering On an RRUAfter all the devices are installed, check the power-on status of an RRU.NOTICEAfter you unpack an RRU, you must power on it within 24 hours. If you power off the RRU formaintenance, you must restore power to the RRU within 24 hours.Figure 10-1 shows the RRU power-on check process.NOTEFor details about how to power on an RRU, see Powering On an RRU. For details about how to power offan RRU, see section "Powering-Off the RRU" in RRU Maintenance Guide.10 Powering On an RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.119
Figure 10-1 RRU power-on check process(a) The normal input voltage of an RRU is -48 V DC. The voltage of the external power supply should rangefrom -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.10 Powering On an RRUIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.120
11 AppendixAbout This Chapter11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on theRRU SideThis section describes the procedure for adding a tool-less female connector (pressfit type) tothe RRU power cable on the RRU side.11 AppendixIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.121
11.1 Adding a Tool-Less Female Connector (Pressfit Type)to the RRU Power Cable on the RRU SideThis section describes the procedure for adding a tool-less female connector (pressfit type) tothe RRU power cable on the RRU side.ContextFigure 11-1 shows the cable diagram on labels.Figure 11-1 Cable diagram on labels(1) Cable diagram on labels NOTICEPrepare a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRUSide by strictly following the following operations. Otherwise, damage to the RRU or personalinjury may occur.ProcedureStep 1 Determine the length of the power cable for different operations based on the labels, as shownin Figure 11-2.11 AppendixIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.122
Figure 11-2 Determining the length of the power cable Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 11-3.Figure 11-3 Stripping the specified length of sheath Step 3 Strip a specified length of sheath off each core wire. The length must be consistent with thelength of the notch in the tool-less female connector (pressfit type), as shown in Figure 11-4.Figure 11-4 Stripping the sheath off each core wire Figure 11-5 Matched length Step 4 Add a tool-less female connector (pressfit type) to two core wires.1. Tighten the screws using a Phillips screwdriver, as shown in Figure 11-6.11 AppendixIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.123
Figure 11-6 Tightening screws 2. Connect the blue core wire labeled NEG(-) to the - port and the black/brown core wirelabeled RTN(+) to the + port on the tool-less female connector (pressfit type), and thentighten the screws using a Phillips screwdriver, and then use a torque screwdriver to tightenthe M4 screws to 1.4 N·m (12.39 lbf·in.), as shown in Figure 11-7.DANGERDo not reversely connect the positive and negative poles. Reverse connection of positiveand negative poles may result in equipment malfunctions or personal injury. Therefore,check the power cable connection before powering on the RRU.Figure 11-7 Adding a tool-less female connector (pressfit type) to two core wires 3. After the core wires are installed, ensure that each core wire is securely installed after beingdragged with a torque of 30 N•m and all copper wires are inserted in the connector terminalsocket.Step 5 Strip the specified length of the sheath off the power cable to expose the intact shield layer, asshown in Figure 11-8.11 AppendixIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.124
Figure 11-8 Stripping the sheath off the power cable NOTICEEach core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm(0.059 [in.]), as shown in Figure 11-9.Figure 11-9 Inserting core wires into the tool-less female connector (pressfit type)----End11 AppendixIssue () Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.125

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