Interface Cable - 3Com 3C13701 Module Manual

3Com Router 5000 and Router 6000 v2.41
Module Guide

2.4.6 Interface Cable

Interface cables for Router 1-Port Fractional E1 SIC are standard E1 G.703 cables. E1
G.703 cables have two types: 75-ohm non-balanced coaxial cables and 120-ohm
balanced twisted pair cables, shown as follows:
75-ohm non-balanced coaxial cable
Enlarged A side
Pos.1
Pos.15
Figure 2-16 E1 G.703 75-ohm non-balanced coaxial cable
75-ohm non-balanced coaxial cable connects Router 1-Port Fractional E1 SIC with the
DB15 connector and the network end with the BNC connector.
Note:
A pair of coaxial connectors are available for extending the E1 cable. Both ends of the connectors are
BNC receptacles that can be used to connect two 75-ohm non-balanced coaxial cables with BNC
connectors.
120-ohm balanced twisted pair cable
Figure 2-17 E1 G.703 120-ohm balanced twisted pair cable
120-ohm balanced twisted pair cable connects Router 1-Port Fractional E1 SIC with
the DB15 connector and network end with the RJ45 connector.
DB15 Male
A
HUAWEI
Chapter 2 Smart Interface Cards
Label Cable tie
Magnetic core
Hot-shrinkable tube
2-17
BNC connector