Nortel Networks 2700 manual 56/64K CSU/DSU WAN interface card

88 Appendix A Technical specifications

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

56/64K

DDS

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.

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 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.

NN46110-311 02.01