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88 Appendix A Technical specifications
NN46110-311 02.01
56/64K CSU/DSU WAN interface card
The 56/64K CSU/DSU WAN interface card has a single RJ-48 connector that
provides the signals needed to interface to network equipment. Figure 36 shows
the 56/64K CSU/DSU WAN interface card.
Figure 36 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 sold as Category 5, or Ethernet,
cables.
Use cable that is 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. 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.
• 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 24 on page 89 provides the 56/64K CSU/DSU cable pinouts for a crossover
connection.
Note: Nortel does not supply an interface cable with the
56/64K CSU/DSU WAN interface card.
56/64K
DDS