| 25 PIN |
9 PIN |
DESCRIPTION |
| 1 |
|
Shield |
| 2 |
3 |
Transmit |
| 3 |
2 |
Receive |
| 4 |
7 |
Request To Send (RTS) |
| 5 |
8 |
Clear To Send (CTS) |
| 6 |
6 |
Data Set Ready (DSR) |
| 7 |
5 |
Signal Ground |
| 8 |
1 |
Data Carrier Detect (DCD) |
| 20 |
4 |
Data Terminal Ready (DTR) |
| 22 |
9 |
Ring Indicator |
To bypass hardware hand-shaking, tie pins 4 and 5 together and pins 6, 8, and 20 together.