B
PIN-OUTS
Null Modem Cable |
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| 3Com Switch | PC/Terminal |
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| Cable connector: | Cable connector: | |||
| Screen | Shell | 1 | Screen | only required if screen |
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| TxD | 3 | 3 | RxD |
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| RxD | 2 | 2 | TxD | always required |
| Ground | 5 | 7 | Ground |
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| RTS | 7 | 4 | RTS |
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| CTS | 8 | 20 | DTR |
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| DSR | 6 | 5 | CTS | required for handshake |
| DCD | 1 | 6 | DSR |
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| DTR | 4 | 8 | DCD |
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| 3Com Switch |
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| Cable connector: | Cable connector: | ||||||||
| Screen | Shell |
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| Shell | Screen | only required if screen |
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| DTR | 4 |
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| 1 | DCD | Required for handshake |
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| TxD | 3 |
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| 2 | RxD | Always required |
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| RxD | 2 |
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| 3 | TxD |
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| CTS | 8 |
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| 4 | DTR | required for handshake |
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| Ground | 5 |
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| 5 | Ground | always required |
| DSR | 6 |
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| 6 | DSR |
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| RTS | 7 |
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| 7 | RTS | required for handshake |
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| DCD | 1 |
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| 8 | CTS |
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