RS-232D
Pinout

RJ45 FEMALE CONNECTOR at the devices.

RJ45 MALE CONNECTOR at the cables.
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | DSR/RI | ← | Data Set Ready / Ring Indicator |
| 2 | CD | ← | Carrier Detect |
| 3 | DTR | → | Data Terminal Ready |
| 4 | GND | ─ | System Ground |
| 5 | RXD | ← | Receive Data |
| 6 | TXD | → | Transmit Data |
| 7 | CTS | ← | Clear to Send |
| 8 | RTS | → | Request to Send |
Note: Direction is DTE (Computer) relative DCE (Modem).