| cable Pin |
Name | Direction | Description |
|---|---|---|---|
| 1 | DCD |  |
Data Carrier Detect |
| 2 | TX |  |
Transmit Data |
| 3 | BOOT | |
|
| 4 | MICROPHONE(+) | |
0.5mA; 100mVpp |
| 5 | MICROPHONE(-) | |
|
| 6 | RX | |
Receive Data |
| 7 | DSR | |
Data Set Ready |
| 8 | DTR | |
Data Terminal Ready |
| 9 | GND |  |
Ground |
| 10 | SPEAKER(+) | -?- | 16mA; 32 Ohm |
| 11 | CTS | |
Clear To Send |
| 12 | RTS | |
Request To Send |
| 13 | RI | |
Ring Indicator |
| 14 | RESET | |
|
| 15 | SPEAKER(-) | -?- |
