Piedinature comuni nei PC

Piedinatura Porta RS-232 PC, 25 pin (maschio):
Piedino	Segnale
2	Transmit data
3	Receive data
4	Request To Send
5	Clear To Send
6	Data Set Ready
7	Ground
20	Data Terminal Ready

Piedinatura Porta RS-232 PC, 9 pin (femmina):
Piedino	Segnale
2	Receive data
3	Transmit data
4	Data Terminal Ready
5	Ground
6	Data Set Ready
7	Request To Send
8	Clear To Send