Eu altamente recomendo o Padrão de Fiação de Dispositivo Serial Yost .
A partir dessa página:
Here is a scheme which solves four of the six RS-232 hassles:
- All cable connectors are the same sex (male).
- All cable connectors are of the same type (RJ-45).
- There is no distinction between DTE and DCE plugs and sockets.
- You can mass-terminate the connector cables with a crimping tool.
The other two hassles that remain are:
- Baud rate matching.
- Flow control problems.
All of your cables are wired the same and have the same connectors.
- No more null-modems or "null-terminal" adapters.
- No more changing pins on cable connectors.
- No more building special cables for each kind of hookup.
- No more soldering or messing with pins on cables.
Não deixe de ver a seção sobre pinagem RJ-45 em conflito.