Table 18 56/64K Csu/Dsu Cable Pinouts For Crossover Connection - Nortel Contivity VPN Switch 1010 Installation Manual

50 Appendix A Technical specifications
Use cable that is wired in accordance with EIA-568-A wiring style. This wiring
style ensures that a twisted pair inside the patch cord carries the transmit signal
(pins 1 and 2) and the receive signal (pins 7 and 8). Nortel strongly recommends
that you use factory-made patch cords.
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.
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Table 18
connection.

Table 18 56/64K CSU/DSU cable pinouts for crossover connection

Nortel termination
Signal
Transmit tip
Transmit ring
not used
not used
not used
not used
Receive tip
Receive ring
The cable operates properly if you do not connect pins 3, 4, 5, and 6.
NN46110-313 02.01
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. Do not interchange the 56/64K CSU/DSU crossover cable and the
Ethernet crossover cable.
provides the 56/64K CSU/DSU cable pinouts for a crossover
Caution: For crossover connections, do not use Ethernet cable. If you
use Ethernet cable, the link cannot be established.
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