| PIN | Signal Name | RS232 | V.35 | EIA530 | RS485 Port A |
|---|---|---|---|---|---|
| 1 | Shield | - | - | - | - |
| 2 | Transmit Data (-) | BA | 103 | BA(A) | TXD- |
| 3 | Receive Data (-) | BB | 104 | BB(A) | |
| 4 | Request to Send (-) | CA | 105 | CA(A) | |
| 5 | Clear to Send (-) | CB | 106 | CB(A) | |
| 6 | Data Set Ready (-) | CC | 107 | CC(A) | |
| 7 | Signal Ground | AB | 102 | AB | GND |
| 8 | Receive Line Signal Detected (DCD)(-) | CF | 109 | CF(A) | |
| 9 | Receive Clock (+) | 115 | DD(B) | ||
| 10 | Receive Line Signal Detected (DCD) (+) | CF(B) | |||
| 11 | Transmit Clock (DTE Source) (+) | 113 | DA(B) | ||
| 12 | Transmit Clock (DCE Source) (+) | 114 | DB(B) | TXC+ | |
| 13 | Clear to Send (+) | CB(B) | |||
| 14 | Transmit Data (+) | 103 | BA(B) | TXD+ | |
| 15 | Transmit Clock (DCE Source) (-) | DB | 114 | DB(A) | TXC- |
| 16 | Receive Data (+) | 104 | BB(B) | ||
| 17 | Receive Clock (-) | DD | 115 | DD(A) | |
| 18 | Receive Data (-)(To Port 2) | RXD- | |||
| 19 | Request to Send (+) | CA(B) | |||
| 20 | Data Terminal Ready (-) | CD | 108 | CD(A) | |
| 21 | Receive Data (+)(To Port 2) | RXD+ | |||
| 22 | Data Set Ready (+) | CC(B) | |||
| 23 | Data Terminal Ready (+) | CD(B) | |||
| 24 | Transmit Clock (DTE Source) (-) | DA | 113 | DA(A) | |
| 25 | Receive Clock (+)(To Port 2) | RXC+ | |||
| 26 | Receive Clock (-)(To Port 2) | RXC- |