Appendix B Adapter cable pinout diagrams 79
X.21 (DCE) adapter cable
Figure 16 shows the pinout settings for an X.21 (DCE) modem adapter cable (part number CQ2118006).
Figure 16 X.21 (DCE) adapter cable diagram
| DB25M | DV15M (X.21 VF) | ||||
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| GND |
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| 1 |
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| 1 | |
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| 2 |
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| 2 | TDA |
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| 4 |
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| 3 | RTA |
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| 3 |
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| 4 | RDA |
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| 5 |
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| 5 | CTSA |
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| 8 |
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| 15 |
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| 6 | RCA |
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DTE |
| 17 |
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| 24 |
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| 7 | ETCA | |
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| 7 |
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| 8 | SGND |
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| 14 |
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| 9 | TDB |
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| 19 |
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| 10 | RTB |
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| 16 |
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| 11 | RDB |
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| 10 |
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| 12 | CTSB |
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| 13 |
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| 9 |
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| 13 | RCB |
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| 12 |
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| 11 |
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| 14 | ETCB |
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| 25 |
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| 26 |
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| 9941EB |
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