Nortel Networks 1050, 1100, 1010 manual T1/E1 CSU/DSU WAN interface card

54 Appendix A Technical specifications

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

CS160012A

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.

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.

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