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