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3Com Router 5000 and Router 6000 v2.41
Module Guide
Chapter 4 Flexible Interface Cards (Router 6000)
4-23
ACTIVE
OFF means no data is being transmitted or received on the interface; blinking
means data is being transmitted and/or received.
4.7.4 Interface Cable
I. Interface cable of the Router 4-Port CE1/PRI FIC
Interface cables for the Router 4-Port CE1/PRI FIC are G.703-compliant cables, also
known as E1 cables. The cables are divided into two categories: 75-ohm unbalanced
coaxial and 120-ohm balanced twisted-pair.
z 75-ohm unbalanced coaxial cable
As shown in the following figure, at the router end of the cable is a DB-15 plug and at
the network end are two BNC receptacles.
Figure 4-25 E1 75-ohm unbalanced coaxial cable
( Note:
To extend an E1 75-ohm unbalanced coaxial cable, you can select a pair of coaxial connectors with a
BNC receptacle at each end to connect the BNC receptacles of the cable each to a 75-ohm unbalanced
coaxial cable with BNC connectors.
z 120-ohm balanced twisted-pair cable
As shown in the following figure, at the router end of the cable is a DB-15 plug and at
the network end is an RJ-45 connector.
Figure 4-26 E1 120-ohm balanced twisted-pair cable
( Note:
To extend an E1 120-ohm balanced twisted-pair cable, you can select a network connector with an
RJ-45 receptacle at each end to connect the cable to another 120-ohm balanced twisted-pair cable.