V.24 & RS232C Link Pinouts
The connector shown here and pinouts described here correspond to the connector labeled “RS232 / V.24” on the back of the P1705 & P1730.
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| 13 | 1 |
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| DB25 Female DTE |
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| 25 | 14 |
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Contact | CCITT |
| Circuit | Circuit |
| Direction | |
Number | Circuit |
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| Name |
| To | From |
| Number |
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| DCE | DCE |
1 | 101 |
| AA | Protective Ground |
| NA | |
2 | 103 |
| BA | Transmitted Data |
| X |
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3 | 104 |
| BB | Received Data |
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| X |
4 | 105 |
| CA | Request to Send |
| X |
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5 |
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6 | 107 |
| CC | Data Set Ready |
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| X |
7 | 102 |
| AB | Signal Ground |
| NA | |
8 | 109 |
| CF | Received Line Signal Detector (CD) |
| X | |
9 |
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10 |
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11 |
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12 |
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13 |
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14 |
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15 | 114 |
| DB | Transmit Signal Element Timing (DCE |
| X | |
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| Source) |
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16 |
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17 | 115 |
| DD | Receive Signal Element Timing (DCE Source) |
| X | |
18 | 141 |
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| Local Loopback |
| X |
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19 |
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20 | 108.2 |
| CD | Data Terminal Ready |
| X |
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21 |
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22 | 125 |
| CE | Ring Indicator |
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| X |
23 |
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24 | 113 |
| DA | Transmit Signal Element Timing (DTE Source) | X |
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25 |
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Figure D-5 RS232 Link Pinouts
The connecting cable must be a shielded cable.
NOTE For U.K. Approval:
The connecting cable may be any length between 0 and 5M. Each end must be terminated in a male 25 pin X.21 bis connector as defined in
