25 pin D-SUB female connector at the
computer.
Available on SUN computers since the SUN3 series (1988) to the current UltraSparc systems (RS423/RS232).
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | n/c | - | |
| 2 | TXD | OUT | Transmit Data |
| 3 | RXD | IN | Receive Data |
| 4 | RTS | OUT | Request to Send |
| 5 | CTS | IN | Clear to Send |
| 6 | DSR | IN | Data Set Ready |
| 7 | GND | - | System Ground |
| 8 | DCD | IN | Data Carrier Detect |
| 9 | n/c | - | BUTTON_POR (Power-on reset) for Sun Ultra 80 / Sun Blade 1000 / Sun Blade 2000 / Sun Fire 280R / Enterprise 420R |
| 10 | n/c | - | BUTTON_XIR_L (Transmit internal reset) for Sun Ultra 80 / Sun Blade 1000 / Sun Blade 2000 / Sun Fire 280R / Enterprise 420R |
| 11 | n/c | - | +5 Vdc for Sun Ultra 80 / Sun Blade 1000 / Sun Blade 2000 / Sun Fire 280R / Enterprise 420R |
| 12 | n/c | - | |
| 13 | n/c | - | |
| 14 | n/c | - | |
| 15 | TRxC | IN | Transmit Clock |
| 16 | n/c | - | |
| 17 | RTxC | IN | Receive Clock |
| 18 | n/c | - | |
| 19 | n/c | - | |
| 20 | DTR | OUT | Data Terminal Ready |
| 21 | n/c | - | |
| 22 | n/c | - | |
| 23 | n/c | - | |
| 24 | TxC | OUT | Transmit Clock |
| 25 | n/c | - |