Appendix B
Null Modem Cable
Specifications
The
The table below shows the pin assignments for the
Function | Mnemonic | Pin |
Carrier | CD | 1 |
Receive Data | RXD | 2 |
Transmit Data | TXD | 3 |
Data Terminal Ready | DTR | 4 |
Signal Ground | GND | 5 |
Data Set Ready | DSR | 6 |
Request To Send | RTS | 7 |
Clear To Send | CTS | 8 |
9 Pin Null Modem Cable |
|
| |
CD | 1 | 4 | DTR |
DSR | 6 | 1 | CD |
DTR | 4 | 6 | DSR |
RXD | 2 | 3 | TXD |
TXD | 3 | 2 | RXD |
GND | 5 | 5 | GND |
RTS | 7 | 8 | CTS |
CTS | 8 | 7 | RTS |
Reserve | 9 | 9 | Reserve |
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