 25 pin D-SUB MALE connector at the computer |
| Pin |
Name |
Dir |
Description |
| 1 |
SNG |
 |
Shield ground |
| 2 |
TXD |
 |
Tx Transmit Data, Out |
| 3 |
RCD |
 |
Rx Receive Data, In |
| 4 |
RTS |
 |
Request to Send, Out |
| 5 |
CTS |
 |
Clear to Send, In |
| 6 |
DSR |
 |
Data Set Ready, In |
| 7 |
GND |
 |
Ground |
| 8 |
DCD |
 |
Data Carrier Detect, In |
| 9 |
n/c |
|
No connection |
| 10 |
n/c |
|
No connection |
| 11 |
n/c |
|
No connection |
| 12 |
CH |
 |
Data signal rate selector, In |
| 13 |
n/c |
|
No connection |
| 14 |
n/c |
|
No connection |
| 15 |
n/c |
|
No connection |
| 16 |
n/c |
|
No connection |
| 17 |
n/c |
|
No connection |
| 18 |
n/c |
|
No connection |
| 19 |
n/c |
|
No connection |
| 20 |
DTR |
Terminal Ready Signal, Out |
| 21 |
n/c |
|
No connection |
| 22 |
CE |
 |
Ring indicator, In |
| 23 |
n/c |
|
No connection |
| 24 |
n/c |
|
No connection |
| 25 |
n/c |
|
No connection |
| |