Connector - Serial (Printer)25 PIN D-SUB MALE at the printer. | (at the printer) |
| Pin | Name | Direction | Description |
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| 1 | SHIELD | --- | Shield Ground | | 2 | TXD | Output | Transmit Data | | 3 | RXD | Input | Receive Data | | 4 | n/c | --- | Not connected | | 5 | n/c | --- | Not connected | | 6 | DSR | Input | Data Set Ready | | 7 | GND | --- | System Ground | | 8 | DCD | Input | Data Carrier Detect | | 9 | n/c | --- | Not connected | | 10 | n/c | --- | Not connected | | 11 | ? | Output | Reverse Channel | | 12 | n/c | --- | Not connected | | 13 | n/c | --- | Not connected | | 14 | n/c | --- | Not connected | | 15 | n/c | --- | Not connected | | 16 | n/c | --- | Not connected | | 17 | TTY-TXD | Output | TTY Receive Data | | 18 | n/c | --- | Not connected | | 19 | n/c | --- | Not connected | | 20 | DTR | Output | Data Terminal Ready | | 21 | n/c | --- | Not connected | | 22 | n/c | --- | Not connected | | 23 | ? | Output | TTY Receive Data Return | | 24 | ? | Input | TTY Transmit Data Return | | 25 | TTY-RXD | Input | TTY Receive Data |
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