Installing Optical Cables for Main-RemoteSolutions

INSTALLATION INSTRUCTIONS

15/1531-LZA 701 0003 Uen H

Copyright

© Ericsson AB 2007 - 2010. All rights reserved. No part of this document maybe reproduced in any form without the written permission of the copyright owner.

Disclaimer

The contents of this document are subject to revision without notice due tocontinued progress in methodology, design and manufacturing. Ericsson shallhave no liability for any error or damage of any kind resulting from the useof this document.

Trademark List

All trademarks mentioned herein are the propertyof their respective owners. These are shown in thedocument Trademark Information.

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Contents

Contents

1 Introduction 1

1.1 Target Group 1

1.2 Prerequisites 1

1.3 Documentation 1

2 Optical Cables 1

2.1 Handling Optical Cables 2

3 Installation Material 5

3.1 Installation Kits 5

3.2 Tools 5

4 Installing Optical Cables 6

4.1 Hoisting Optical Cables 6

4.2 Installing with Plastic Covered Steel Tie Straps 7

4.3 Installing with Cable Cleats 8

4.4 Installing Tubes 8

4.5 Installing Indoor Cable Chutes 10

4.6 Installing and Using Cable Winders 11

5 Checking the Installation 13

5.1 Common Causes of Faults 14

Glossary 15

Reference List 17

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Installing Optical Cables for Main-Remote Solutions

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Optical Cables

1 Introduction

This document describes general principles for how to install an optical cablebetween the main unit and the remote radio unit in a Main-Remote system.

1.1 Target Group

This document is for all personnel working directly or indirectly with the logistics,engineering, or installation.

1.2 Prerequisites

Technicians working with Ericsson products or systems must have thenecessary training and skills to perform their work correctly.

Safety Regulations

Before starting work on the site, the following documents must be read andunderstood:

• Personal Health and Safety Information,124 46–2885

• System Safety Information, 124 46–2886

1.3 Documentation

See Reference List on page 17 for needed documents.

2 Optical Cables

This section introduces optical cables and describes handling of optical fibercables.

Optical cables must be handled with care. Optical cables consist of thin glassfibers protected by plastic coating.

Connectors for different optical cables are listed in Table 1 and Table 2.

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The LC, SC and ODC connectors are shown in Figure 1.

P018900C

LC ODC/RDCSC

Figure 1 LC, SC and ODC Connectors without Protective Covers

Note: Never touch the end face of the optical connectors. Only removeprotective covers immediately before connecting to the Main Unit (MU)or the Remote Radio Unit (RRU).

2.1 Handling Optical Cables

When handling optical cables, consider the following:

• Optical cables are sensitive to mechanical stress, sharp bends, kinks, dust,and dirt. They are not, however, sensitive to electrical interference.

• Never over-bend the cable. See Table 1 and Table 2 for minimum bendingradius.

• Make sure not to apply excessive force to the cable, See Table 1 and Table2 for maximum tensile force values.

• Be careful with the connectors when connecting optical cables to MUsand RRUs.

P018863A

OIL Cable

Minimumbendingradius

Minimumbendingradius

Acceptable Not acceptable(too sharp bend)

Figure 2 Minimum Bending Radius

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Optical Cables

2.1.1 Optical Cables Not Requiring Mechanical Protection for Installation

The optical cables in Table 1 do not require to be installed with mechanicalprotection, installation with plastic covered steel tie straps or cable cleatsis sufficient.

The L at the end of the product numbers defines the lengths of the opticalcables.

Note: The maximum allowed strapping distance applies if the optical cablesare installed outdoors with wind force conditions up to 55 m/s.

Table 1 Optical Cables Not Requiring Mechanical Protection for Installation

ProductNumber

Application,Main-RemoteSystem

Connectors(MU/RRU)

MinimumBendingRadius onMain Cable

MinimumBendingRadius onSplit Cable

MaximumTensileForce

MaximumLengthof FreeHangingCable

MaximumStrappingDistance

RPM 2531633/L

RBS 6601/RRUS 11

LC/LC(1) 40 mm 10 mm 300 N 50 m 0.5 m

RPM 2532788/L

RRU22/ RRUW LC/LC 40 mm 10 mm 300 N 50 m 0.5 m

RPM 2532895/L

RRUW/ RRUWRRUS/ RRUSRRUW/ RRUS

LC/LC 40 mm 10 mm 300 N 50 m 0.5 m

RPM 2533577/L R1B orlater

RBS 3018/RRUWRBS 3106(2)/RRUWRBS 3206(2)/RRUWRBS 3418/RRUWRBS 3518/RRUWRBS 6601/RRUWRBS 6601/RRUS 01

LC/LC 40 mm 10 mm 300 N 50 m 0.5 m

RPM 2533878/L R1B orlater

RBS 3412/RRUW

LC/LC 40 mm 10 mm 300 N 50 m 0.5 m

RPM 2534388/1000 R1Bor later

(3)ODC/LC 40 mm 10 mm 300 N 1 m 0.5 m

(1) With FULLAXS on RRU LC connector.(2) Macro RBS with OBIF(3) Adapter Cable, for replacing an RRU22 with an RRUW.

2.1.2 Optical Cables Requiring Mechanical Protection for Installation

The optical cables in Table 2 all require to be installed with mechanicalprotection.

The L at the end of the product numbers defines the lengths of the opticalcables.

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Installing Optical Cables for Main-Remote Solutions

Table 2 Optical Cables Requiring Mechanical Protection for Installation

Product Number Application,Main-RemoteSystem

Connectors(MU/RRU)

MinimumBendingRadius onMain Cable

MinimumBendingRadius onSplit Cable

MaximumTensileForce

MaximumLength ofFree HangingCable

RPM 119 0599/L RBS 8418/RRU46RBS 8418/RRU46iRBS 8418/RRU86RBS 8418/RRU86ARBS 8418/RRU112

LC/LC 40 mm n/a 300 N 30 m

RPM 119 0600/L RRU46/ RRU46RRU46i/ RRU46iRRU86/ RRU86RRU86A/RRU86ARRU112/RRU112

LC/LC 140 mm n/a 300 N 30 m

RPM 253 1306/L(1) RBS 3402/RRU11RBS 3412/RRU11

LC/LC 100 mm n/a 100 N 30 m

RPM 253 3577/LR1A

RBS 3018/RRUWRBS 3418/RRUWRBS 3518/RRUW

LC/LC 40 mm 15 mm 300 N 50 m

RPM 253 3878/LR1A

RBS 3412/RRUW

LC/LC 40 mm 15 mm 300 N 50 m

RPM 2534388/1000 R1A

(2)ODC/LC 40 mm 15 mm 300 N 1 m

TSR 899 071/L RBS 3402/RRU11RBS 3412/RRU11

LC/LC 100 mm n/a 300 N 50 m

TSR 899 088/L RBS 2111/RRU-N

SC/SC 50 mm n/a 300 N 50 m

TSR 899 099/L RBS 3412/RRU22

LC/ODC 100 mm n/a 300 N 50 m

TSR 899 113/L RBS 3018/RRU22RBS 3418/RRU22RBS 3518/RRU22RBS 6601/ RRUL

LC/ODC 100 mm n/a 300 N 50 m

TSR 899 115/L RBS 3018/RRU11RBS 3418/RRU11RBS 3518/RRU11

LC/LC 100 mm n/a 300 N 50 m

(1) For indoor use only.(2) Adapter Cable, for replacing an RRU22 with an RRUW.

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Installation Material

3 Installation Material

This section describes the installation kits and tools recommended for theinstallation.

3.1 Installation Kits

The installation kits are available in outdoor and indoor variants. Therecommended kits are listed below. See Reference [3] and Reference [4] forfurther installation materials.

Table 3 Installation Kits

Product Number Description

SET 145 095/457 Plastic Covered Steel Tie Straps Kit.

NTM 201 3931/1, NTM 2013931/2 or NTM 201 3931/3

Main Remote Cable Cleats Kits.

NTM 201 3811/1 Cable tube kit, 25 m flexible tubes, includingdraw wire and fastening material for tower,wall, and ladder.

NTM 201 3727/1 Cable tube kit, 8.5 m split tubes, includingfastening material for tower, wall, andladder.

NTM 201 3730/1 Indoor cable chute kit, 2×2 m includingfastening material for wall and ladder.

NTM 201 3728/1 Support kit for three optical cables and threepower cables in tower.

NTM 201 3729/1 Cable winder box for 30 m optical cableincluding fastening material for wall andtower.

NTM 201 3767/1 Marking set for WCDMA main-remote site.

NTM 201 3767/2 Marking set for GSM main-remote site.

3.2 Tools

The table below shows the tools required to install an optical cable. SeeReference [5] for further information on required tools.

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Installing Optical Cables for Main-Remote Solutions

Table 4 Tools

Product Number Description

LTT 601 135/1 or LTT 601 156/1 Personal tool set.

LSD 901 52/1 Cable tie tensioning tool.

LPB 112 102/1 Fiber check tool to check opticalcables.

LPK 102 111/1 OTDR, Optical Site Master with powermeter for measurement of opticalcables and optical transmission,testing distance up to 2.5 km.

LTT 601 154/1 Ferrule end-face cleaner for cleaningoptical cable ends on LC connectors.

4 Installing Optical Cables

This section describes the installation procedure of optical cables. See forfurther information on installation material.

4.1 Hoisting Optical Cables

To hoist an optical cable to an RRU, do the following:

1. Attach a sleeve to the optical cable to relieve the cable from any load.

Note: Position the sleeve so that the cable will easily reach the RRUconnector.

P018905A

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Installing Optical Cables

2. Attach a rope according to figureand pull the cable.

P018867A

3. Anchor the cable by a steel wire andcarabiner.

P018868A

Note: Each carabiner can be used to hold three optical cable sleeves andthree power cable sleeves, all cables going through the same tube.

4.2 Installing with Plastic Covered Steel Tie Straps

Plastic covered tie straps are sufficient for installing the optical cables in Table1, where mechanical protection is not required.

Apply the tie straps with a strapping distance according to Table 1.

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Installing Optical Cables for Main-Remote Solutions

4.3 Installing with Cable Cleats

Figure 3 shows cable cleats sufficient for installing the optical cables in Table 1,where mechanical protection is not required.

Figure 3 Cable Cleat

Apply the cable cleats with a distance according to Table 1.

4.4 Installing Tubes

This section describes how to install tubes for optical cables that requiremechanical protection.

Tubes are used to protect the optical cable from mechanical stress.

4.4.1 Installing Flexible Tubes

Flexible tubes can be installed on a rooftop, wall, or a tower.

To route the cables in different directions, use T-joints. See Figure 4. Thecables are easily pulled through the tube using a draw wire.

• When installing tubes on a rooftop, use included clamps either directly onthe roof or fixed to free-standing concrete slabs to avoid damage to theroof. See Figure 4.

• When installing tubes on an indoor or outdoor wall, use included clamps.

• When installing tubes on a tower, use included steel cable tie straps every0.8 m.

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Installing Optical Cables

P020154A

Figure 4 Flexible Tube Installation

4.4.2 Installing Split Tubes

Split tubes are preferred for installations on existing main-remote sites.

Split tubes can be installed on a tower or a wall.

To install tubes, do the following:

1. When installing tubes on a tower, use included steel cable tie straps.

2. When installing tubes on an indoor or outdoor wall, use included clamps.

3. Close the tubes, cover the joints with plastic sleeves and seal with tape.See Figure 5.

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Installing Optical Cables for Main-Remote Solutions

Note: For optimal stability, fasten three cable tie straps or clamps per tube,one on each end of the tube, next to the joints, and one in the middle.

P018861A

Figure 5 Split Tube Installation

4.5 Installing Indoor Cable Chutes

This section describes how to install indoor cable chutes for optical cablesthat require mechanical protection.

Indoor cable chutes are used to protect the optical cable from mechanicalstress and can be installed on a ladder or a wall.

To install indoor cable chutes, do the following:

1. Screw the cable chutes to a ladder or a wall.

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Installing Optical Cables

2. Lay the optical cable in the cable chutes and put on the cover.

P018869A

Figure 6 Indoor Cable Chute Installation

4.6 Installing and Using Cable Winders

Optical cables must never be cut. Instead, wind all excess cable on a cablewinder. Using a cable winder insures that the requirements on minimum cablebending radius are fulfilled.

The cable winder should be installed close to the main unit. It can be installedon a tower, on a wall or in a cabinet.

To install and use a cable winder, do the following:

1. Using a sharp tool, push out the marked cable entrance and exit holes onthe vertical side of the cable winder.

Note: It is recommended to polish the cable entrance and exit holes toavoid damaging of the optical cable.

2. When installing the cable winder on a tower, screw the brackets to thecable winder and attach them to the tower using steel cable tie straps,see Figure 7.

3. When installing the cable winder on a wall, drill holes through the cablewinder and screw it to the wall.

4. When installing the cable winder in a cabinet, insert the cable winder in a19-inch rack and attach with screws.

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P018859A

Figure 7 Winding the Optical Cable

5. Wind the excess optical cable on the cable winder according to Figure 7.

6. Attach the cover to the cable winder.

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Checking the Installation

5 Checking the Installation

Check the optical cable installation to insure that the cables have been handledproperly during the installation.

The optical cables are checked by using the fiber check tool to shine laser lightthrough the cable, see A in Figure 8.

Note: Never touch the end face of the optical connectors. Only removeprotective covers immediately before connecting to the MU or the RRU.

Start

Menu

Set

F1

F2

F3

F4

B

A

C

Figure 8 A: Checking the Optical Cable, B: Using the Ferrule End-FaceCleaner, C: the OTDR Sitemaster

Cable LC connectors can be cleaned using the ferrule end-face cleaner, see Bin Figure 8.

After cleaning, check again that the laser light goes through the cable.

If fault or high attenuation still is suspected then use the OTDR, Optical SiteMaster, see C in Figure 8.

If the problem remains, then it is probably due to improper handling of theoptical cable (see Section 5.1 on page 14) and the cable must be replaced.Contact site supervisor before taking action.

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Installing Optical Cables for Main-Remote Solutions

5.1 Common Causes of Faults

Common causes of faults include kinks in cables and cable tie straps that aretoo tight, as shown in Figure 9.

P018890A

Figure 9 Wrong Handling of Optical Cables

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Glossary

Glossary

MUMain Unit

N/A, n/aNot applicable

OTDROptical Time Domain Reflectometer

RRURemote Radio Unit

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Reference List

Reference List

The following documents are related to this procedure:

Safety

[1] Personal Health and Safety Information, 124 46-2885

[2] System Safety Information, 124 46-2886

Site

[3] Main-Remote Installation Products Overview, 16/1551-LZA 701 0003

[4] Site Installation Material Overview, EN/LZT 751 0049

[5] Site Implementation Team Products Overview, EN/LZT 751 0065

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