Nortel 1700, Инструкция по установке

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Appendix A Technical specifications 73
Installing the Contivity 1700
The cable you use should be 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. The use of
factory-made patch cords is strongly recommended.
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. The 56/64K CSU/DSU crossover cable and the Ethernet crossover
cable are not interchangeable.
Table 17 provides the 56/64K CSU/DSU cable pinouts for a crossover connection.
The cable will operate properly if pins 3, 4, 5, and 6 are not connected.
Table 17 56/64K CSU/DSU cable pinouts for crossover connection
Nortel Networks 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. The link
will not be established.