Nortel Networks 2700 manual Quad T1/E1 CSU/DSU WAN interface card

Appendix A Technical specifications 95

Quad T1/E1 CSU/DSU WAN interface card

The quad T1/E1 CSU/DSU WAN interface card has four connectors that provide the signals needed to interface to T1 or E1 equipment. Figure 41 shows the quad T1/E1 CSU/DSU WAN interface card.

Figure 41 Quad T1/E1 CSU/DSU WAN interface card

CS160012A

Each connector on the quad 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.

Note: Nortel does not supply cables with the quad T1/E1 CSU/DSU interface card.

Use cables that are 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 quad 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.

For information about the cable pinouts for a crossover connection, see Table 29 on page 93. For information about the cable pinouts for a straight-through connection, see Table 30 on page 94.

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