
ACCULINK 3172 and 3174 E1 DSU/CSU
D-2
March 1999
3170-A2-GB20-30
E1 Network Interface
The E1 network interface is either two BNC
connectors (Transmit and Receive) for a 75-ohm
unbalanced interface, or an RJ48C, 8-position, unkeyed
modular connector (Table D-1) for a 120-ohm balanced
interface.
The E1 120-ohm network interface adapter cable is
shown in Figure D-1.
Table D-1
E1 120-Ohm Balanced
Interface Connector
Signal
Pin Number
Receive Ring
1
Receive Tip
2
Receive Shield
3
Transmit Ring
4
Transmit Tip
5
Transmit Shield
6
Figure D-1. E1 120-Ohm Network Interface Adapter Cable