3Com Router 5000 and Router 6000 v2.41

Module Guide

Chapter 4 Flexible Interface Cards (Router 6000)

4.20.5 Connecting the Interface Cable

Caution:

If outdoor cabling is involved, consider to install a special lightning arrester at the input end of the interface cable for better lightning protection.

Before you connect a port, read its label carefully; a wrong connection can cause damages to the interface card and even the device.

Step 1: Insert the DB-15 connector of the cable into the DB-15 port on the Router 1-Port E1 Voice FIC and tighten the thumbscrews.

Step 2: Connect the RJ-45 connector at the other end of the cable as follows:

zIf the impedance of the to-be-connected port is 120-ohm, and if cable extension is not required,

Directly plug the RJ-45 connector into the port.

zIf the impedance of the to-be-connected port is 120-ohm, and if cable extension is required,

Extend the E1 120-ohm balanced twisted-pair cable with a network connector, as shown in the following figure.

Router

DB-15

RJ-45RJ-45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120-ohm balanced

Network interface120-ohm E1

twisted pair cable

 

 

connector

trunk cable

Voice Device

Figure 4-62Extend an E1 120-ohm balanced twisted-pair cable

zIf the impedance of the to-be-connected port is 75-ohm, Use a 75-to-120-ohm adapter for connection.

Step 3: Power on the router, and check the behavior of the LINK LED on the Router

1-Port E1 Voice FIC panel: OFF means fault occurs on the line. Check it for the cause.

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3Com 3C13701 3C13751 3C13755 3C13759 3C13840 3C13880 manual Connecting the Interface Cable

3C13751, 3C13701, 3C13840, 3C13759, 3C13880 specifications

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