94Appendix A Technical specifications
Table 29 T1/E1 CSU/DSU cable pinouts for crossover connection (continued)
| Pair number | ||
end | Signal name | and conductor | end |
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5 | wht/blu pair 1A | 1 | |
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6 | not used | green pair 3B | 6 |
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7 | not used | wht/brn pair 4A | 7 |
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8 | not used | brown pair 4B | 8 |
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The cable operates properly if you do not connect pins 3, 6, 7, and 8.
Caution: For crossover connections, do not use Ethernet cable. If you use Ethernet cable the T1/E1 CSU/DSU does not work to specifications. This condition can corrupt data.
Table 30 provides the T1/E1 CSU/DSU cable pinouts for a
Table 30 T1/E1 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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Receive A (RXDA) | 1 | 1 | Receive A (RXDA) |
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Receive B (RXDB) | 2 | 2 | Receive B (RXDB) |
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not used | 3 | 3 | not used |
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Transmit B (TXDB) | 4 | 4 | Transmit B (TXDB) |
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Transmit A (TXDA) | 5 | 5 | Transmit A (TXDA) |
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not used | 6 | 6 | not used |
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not used | 7 | 7 | not used |
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not used | 8 | 8 | not used |
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