Connector - Serial (SUN)Available on SUN computers since the SUN3 series (1988) to the current UltraSparc systems (RS423/RS232)25 PIN D-SUB FEMALE at the computer.  | (at the computer) |
| Pin | Name | Direction | Description |
|---|
| 1 | n/c | --- | | | 2 | TXD | Output | Transmit Data | | 3 | RXD | Input | Receive Data | | 4 | RTS | Output | Request to Send | | 5 | CTS | Input | Clear to Send | | 6 | DSR | Input | Data Set Ready | | 7 | GND | --- | System Ground | | 8 | DCD | Input | Data Carrier Detect | | 9 | n/c | --- | | | 10 | n/c | --- | | | 11 | n/c | --- | | | 12 | n/c | --- | | | 13 | n/c | --- | | | 14 | n/c | --- | | | 15 | TRxC | Input | Transmit Clock | | 16 | n/c | --- | | | 17 | RTxC | Input | Receive Clock | | 18 | n/c | --- | | | 19 | n/c | --- | | | 20 | DTR | Output | Data Terminal Ready | | 21 | n/c | --- | | | 22 | n/c | --- | | | 23 | n/c | --- | | | 24 | TxC | Output | Transmit Clock | | 25 | n/c | --- | |
Note: Direction is DTE (Computer) relative DCE (Modem).
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