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Appendix A Technical specifications 89
Nortel VPN Router Installation — VPN Router 2700
The cable operates properly if you do not connect pins 3, 4, 5, and 6.
Table 25 provides the 56/64K CSU/DSU cable pinouts for a straight-through
connection.
Table 24 56/64K CSU/DSU cable pinouts for crossover connection
Nortel termination Remote termination
Signal Pin # to Pin # Signal
Transmit tip 1 7 Receive tip
Transmit ring 2 8 Receive ring
not used 3 3 not used
not used 4 4 not used
not used 5 5 not used
not used 6 6 not used
Receive tip 7 1 Transmit tip
Receive ring 8 2 Transmit ring
Caution: For crossover connections, do not use Ethernet cable. If you
use Ethernet cable, the link cannot be established.
Table 25 56/64K CSU/DSU cable pinouts for straight-through connection
Nortel termination Remote termination
Signal Pin # to Pin # Signal
Transmit tip 1 1 Transmit tip
Transmit ring 2 2 Transmit ring
not used 3 3 not used
not used 4 4 not used
not used 5 5 not used
not used 6 6 not used
Receive tip 7 7 Receive tip
Receive ring 8 8 Receive ring