Connectors and Cables
RS-232 to RS-232 DCE Cable
This
Figure 2-14 shows the pin assignments of the RS-232 cable.
To |
| To modem/TA or CSU/DSU | ||||||||||||||||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 12 | 13 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 12 | 13 | ||||
14 15 | 16 | 17 | 18 | 19 | 20 | 21 22 | 23 | 24 | 25 |
| 14 15 | 16 | 17 | 18 | 19 | 20 | 21 22 | 23 | 24 | 25 | ||||||||
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| Abbr | Pin | Pin | Abbr |
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| Shield | Chassis GND | 1 | 1 | Chassis GND | Shield |
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Transmit Data |
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| TxD | 2 | 2 | TxD |
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| Transmit Data |
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Receive Data |
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| RxD | 3 | 3 | RxD |
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| Receive Data |
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Request to Send |
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| RTS | 4 | 4 | RTS |
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| Request to Send | ||||||||||||||
Clear to Send |
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| CTS | 5 | 5 | CTS |
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| Clear to Send |
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DCE Ready |
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| DSR | 6 | 6 | DSR |
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| DCE Ready |
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Signal Ground |
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| GND | 7 | 7 | GND |
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| Signal Ground |
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Carrier Detect |
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| CD | 8 | 8 | CD |
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| Carrier Detect |
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Transmit Clock |
| TxC (SCT) | 15 | 15 | TxC (SCT) |
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| Transmit Clock |
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Receive Clock |
| RxC (SCR) | 17 | 17 | RxC (SCR) |
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| Receive Clock |
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DTE Ready |
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| DTR | 20 | 20 | DTR |
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| DTE Ready |
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Remote Loopback |
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| RL | 21 | 21 | RL |
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| Remote Loopback | |||||||||||||
Ring Indicator |
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| RI | 22 | 22 | RI |
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| Ring Indicator |
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Transmit Clock (DTE Source) |
| TT (SCTE) | 24 | 24 | TT (SCTE) |
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| Transmit Clock (DTE Source) | ||||||||||||||||||||
Test Mode |
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| TM | 25 | 25 | TM |
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| Test Mode |
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Figure 2-14 RS-232 Straight-Through Cable
3Com does not sell this cable.
