# Serial (PC 25)

(At the computer)

25 PIN D-SUB MALE at the computer.

Pin | Name | Dir | Description
--- | --- | --- | ---
1 | SHIELD | - | Shield Ground
2 | TXD |  | Transmit Data
3 | RXD |  | Receive Data
4 | RTS |  | Request to Send
5 | CTS |  | Clear to Send
6 | DSR |  | Data Set Ready
7 | GND | - | System Ground
8 | CD |  | Carrier Detect
9 | n/c | - |
10 | n/c | - |
11 | n/c | - |
12 | n/c | - |
13 | n/c | - |
14 | n/c | - |
15 | n/c | - |
16 | n/c | - |
17 | n/c | - |
18 | n/c | - |
19 | n/c | - |
20 | DTR |  | Data Terminal Ready
21 | n/c | - |
22 | RI |  | Ring Indicator
23 | n/c | - |
24 | n/c | - |
25 | n/c | - |