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Appendix A Technical specifications 95
Nortel VPN Router Installation — VPN Router 2700
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
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.
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.
Note: Nortel does not supply cables with the quad T1/E1 CSU/DSU
interface card.
CS160012A