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Figure 25 56/64K CSU/DSU WAN interface card
The connector on the 56/64K CSU/DSU WAN interface card accommodates an
8-pin RJ-48 modular patch cord. These cables are commonly sold as Category 5,
or Ethernet, cables.
Note: Nortel does not supply an interface cable with the
56/64K CSU/DSU WAN interface card.
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 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.
•
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.
Table 18 on page 79
connection.
Table 18 56/64K CSU/DSU cable pinouts for crossover connection
Nortel termination
Signal
Transmit tip
Transmit ring
56/64K
DDS
provides the 56/64K CSU/DSU cable pinouts for a crossover
Remote termination
Pin # to Pin #
1
7
2
8
Nortel VPN Router Installation — VPN Router 600
Appendix A Technical specifications 79
Signal
Receive tip
Receive ring
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