Telecommunication Cabling

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………… Introduction

………… Cables & Connectors

………… Tools

………… Cable Preparation

………… Handling

………… Maintenance and

Replacement

COURSE CONTENTS

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3

INTRODUCTION

CABLING THE CORE ROLE BETWEEN SOURCE & OBJECT

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 The course providestheoretical knowledge and

practical skills to electrical Tradespersons, Trade

Assistant or anyoneassociated with

telecommunication cablesinstallation and their earthingrequirements.

COURSE AIM

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BASIC TYPES OF TRANSMISSION LINES

1. Two wire line (upto 200 Mc/s)

Open-wire line consisting of two parallelwires

twisted-pair line of two insulated wirestwisted together (Cable twisting helps to

reduce noise pickup from outside sourcesand crosstalk on multi-pair cables)

2. Coaxial cable (200 Mc/s – 3 Gc/s)

3. Waveguide (above 3 Gc/s)  Rectangular

Circular

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1- Determine your cable size.

2- Choose the right connectors.

3- Use proper Tools for cablemaking.

THREE STEPS FOR CABLE MAKING

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(DB9 F)(DB9 M)

(RJ-45)

(DB15 M) (DB15 F)

(DB25 M)

(DB25 F)

ONNECTORS FOR ENGINEERING CABLE

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(CONNECTORS FOR LOOLING CORDS)

BNC Connectors 

TNC Connectors 

FC connector 

T43 Connectors 

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TELECOM CABLES & CONNECTORS

Coaxial Cable &Connector

Copper Tube

Jacket

Physical Foamed

Copper Tube

RF Feeder Cable& Connector

2 Mb CoaxialCable & BNCConnector

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TELECOM CABLES & CONNECTORS

Ethernet Cable&

RJ-45 Connector

Engineering Cable& D-Sub Connector

DC Power Cable& Connector

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TOOLS

Tool Box

Wire Stripper 

Cable Jacket Remover 

Cutter (Knife

Hacksaw

Warding File

Brush

RJ45 Tool

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(RS-232 Interface Cable)

R2

S3

S3

R2

DTE DCE

Initially RS232 standards to 256kbps or 

less and line lengths of 15M (50 ft) or less

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Connector Type Pin Connections

DB-9(F)

1 2 3 4 5 6 7 8 9

DB-9 (M) NC 3 2 NC 5 & 7 NC NC NC NC

(Motorola BTS “MMI” Cable Configuration)

(DB9 F) (DB9 M)

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Connector Type Pin Connections

DB-9(F)

1 2 3 4 5 6 7 8 9

DB-25 (M) 8 3 2 20 7 6 4 5 22

(Motorola BSC Cable Configuration)

(DB9 F) (DB25 M)

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Connector Type Pin Connections

DB-9(F)

1 2 3 4 5 6 7 8 9

DB-15 (M) NC 15 13 NC 14 NC 11 12 NC

(NEC Microwave “PNMT” Cable Configuration

(DB9 F) (DB15 M)

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Connector Type Pin Connections

DB-9(F)

1 2 3 4 5 6 7 8 9

DB-9 (M) 1 2 3 4 5 6 7 8 9

Alcatel Microwave “B-B” Cable Configuration

(DB9 F) (DB9 M)

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Connector Type Pin Connections

DB-9(F)

1 2 3 4 5 6 7 8 9

DB-9 (M) NC 3 2 8 5 NC NC NC NC

(Eltek Rectifier Cable Configuration)

(DB9 F) (DB9 M)

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ght-Thru and Crossover Cable Configur

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(Networking Cable with RJ-45 Connectors)

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(Engineering Cable with D-Sub Connectors)

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1- Cut the cableperpendicularly.

2- Peel the cable so that at least twovalleys will be visible. Place the cable inthe cutting tool. Rotate the tool until acut has been made. Make sure that youdon’t cut into the copper.

3- Peel off the plastic jacket with a

knife.

4- Place the cable into the tool again.Lightly close the tool and rotate clockwiseuntil the blade has cut the cable all the

way to the inner conductor.

(FEEDER CABLE PREPERATION)

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5- Remove the outer conductorandthe foam from the innerconductor.

6- Clean the innerconductorwith the abrasive paper

11.5 - 14 mm (0.45 - 0.55”)

~30mm (~1.18”)

 7- Chamfer the edge of the inner

conductor with a file .

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8- Gently clean any looseparticles off the end of thecable.

9- Push the connector onto theprepared cable until the cabletouches the bottom of theconnector.

10-  Tighten the connectorwithout rotating the front piece.  The assembly is now

complete

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L-type connector includes

six components(i) L-type connector for IDU.(ii) H-type connector for

ODU.

Standard Assembly of L-type IF Connector

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Number Alarm

Indication

Color code for cable

1 GENSET WHITE / BLUE GREY / RED

2 DC-DC CONVERTER BLUE / WHITE BLACK / BLUE

3 TEMPERATURE WHITE / ORANGE BLUE / BLACK  

4 LOW VOLTAGE ORANGE / WHITE BLACK / ORANGE

5 INTRUDER WHITE / GREEN ORANGE / BLACK  

6 RECTIFIER MAJOR GREEN / WHITE BLACK / GREEN

7 FIRE WHITE / BROWN GREEN / BLACK  

8 RECTIFIER MINOR BROWN / WHITE BLACK / BROWN

CABLE COLOR CODES FOR SITE EXT ALARMS (BTS)

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Glossary of Abbreviations

BTS Base Transceiver Station

D-Sub D-subminiature (D shaped)DB Data Base Connector

DCE Data Communications Equipment

DTE Data Terminal Equipment

PC Personal Computer

FC Fiber Optic Cables & Connectors

BNC Bayonet Neill-Concelman , British Naval Connector , BayonetNut Connector

 TNC Threaded Neill-Concelman

 T-43 HDC High Density Connector (T43)

Mb Megabit

RJ-45 Registered Jack # 45

RF Radio Frequency

 Tx Transmit

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Thank You