Making A T1/E1/Pri Crossover Cable - NEC DSX-160 Hardware Manual

Installing Cards

Making a T1/E1/PRI Crossover Cable

If you don't have a T1 Tester, you can alternately test Tie Line operation between two T1/E1/PRI Cards in
the same cabinet or facility using the cable shown below. Using this same setup, you can loop a Tie Line to a
DID Line to test your DID routing before connecting to the CSU.
To T1 PCB
Latch
faces up
80061 - 3
40 ◆ Installation
Pin
1 RX1T
2 RX1R
3
4 TX1T
5 TX1R
6
7
8
Connecting Two T1 PCBs Together without a Telco T1 Circuit
(For Tie Line Testing)
Figure 23: Making a T1/E1/PRI Crossover Cable
Pin
8
7
6
5
TX1R
4
TX1T
3
2
RX1R
1
RX1T
DSX-80/160 Hardware Manual
To T1 PCB