Nortel 1010 用户手册
50
Appendix A Technical specifications
NN46110-313 02.01
Use cable that is 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 1 and 2) and the receive signal (pins 7 and 8). Nortel strongly recommends
that you use factory-made patch cords.
style ensures that a twisted pair inside the patch cord carries the transmit signal
(pins 1 and 2) and the receive signal (pins 7 and 8). 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.
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.
(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.
cable. Do not interchange the 56/64K CSU/DSU crossover cable and the
Ethernet crossover cable.
provides the 56/64K CSU/DSU cable pinouts for a crossover
connection.
The cable operates properly if you do not connect pins 3, 4, 5, and 6.
Table 18
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.
use Ethernet cable, the link cannot be established.