Table 17 56/64K Csu/Dsu Cable Pinouts For Crossover Connection; Installing The Contivity 1700 - Nortel Contivity 1700 Installing Manual

The cable you use should be wired in accordance with EIA-568-A wiring style.
This wiring style ensures that the transmit signal (pins 1 and 2) and the receive
signal (pins 7 and 8) are carried on a twisted pair inside the patch cord. The use of
factory-made patch cords is strongly recommended.
You connect the 56/64K CSU/DSU WAN interface card to the service provider
network using a straight-through cable or a crossover cable, depending on how the
service provider wired its jack.
• For a straight-through connection, you can use a standard Category 5
(Ethernet) straight-through cable.
• For a crossover connection, you cannot use a standard Category 5 crossover
cable. The 56/64K CSU/DSU crossover cable and the Ethernet crossover
cable are not interchangeable.
Table 17 provides the 56/64K CSU/DSU cable pinouts for a crossover connection.

Table 17 56/64K CSU/DSU cable pinouts for crossover connection

Nortel Networks termination
Signal
Transmit tip
Transmit ring
not used
not used
not used
not used
Receive tip
Receive ring
The cable will operate properly if pins 3, 4, 5, and 6 are not connected.
Caution: For crossover connections, do not use Ethernet cable. The link
will not be established.
Appendix A Technical specifications 73
Remote termination
Pin # to Pin # Signal
1 7 Receive tip
2 8 Receive ring
3 3 not used
4 4 not used
5 5 not used
6 6 not used
7 1 Transmit tip
8 2 Transmit ring

Installing the Contivity 1700