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54 Appendix A Technical specifications
NN46110-313 02.01
T1/E1 CSU/DSU WAN interface card
The T1/E1 CSU/DSU WAN interface card has a single connector that provides
the signals needed to interface to T1 or E1 equipment. Figure 24 shows the T1/E1
CSU/DSU WAN interface card. This interface card ships as a half-height card and
as a full-height card.
Figure 24 T1/E1 CSU/DSU WAN interface card
The connector on the T1/E1 CSU/DSU WAN interface card accommodates an
8-pin RJ-48 modular patch cord. These cables are sold as Category 5, or Ethernet,
cables. Nortel does not supply an interface cable with the T1/E1 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 4 and 5) and the receive signal (pins 1 and 2). Nortel strongly recommends
that you use factory-made patch cords.
You connect the T1/E1 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 T1/E1 CSU/DSU crossover cable and the
Ethernet crossover cable.
Note: The brackets of the half-height and full-height cards are almost
identical. For E1 service, you must install the half-height version of the
T1/E1 CSU/DSU WAN interface card.
CS160012A