Cavo Nullmodem (9-25)

Cavo per 2 apparecchiature DTE (ad esempio 2 computer).

9 PIN D-SUB FEMALE (Al Computer 1). 25 PIN D-SUB FEMALE (Al Computer 2).

9 PIN D-SUB FEMMINA al Computer 1.
25 PIN D-SUB FEMMINA al Computer 2.

	D-Sub 9	D-Sub 25
Receive Data	2	2	Transmit Data
Transmit Data	3	3	Receive Data
Data Terminal Ready	4	6+8	Data Set Ready + Carrier Detect
System Ground	5	7	System Ground
Data Set Ready + Carrier Detect	6+1	20	Data Terminal Ready
Request to Send	7	5	Clear to Send
Clear to Send	8	4	Request to Send

Nota: I pins DSR & CD sono ponticellati per far credere al programma di essere collegati on-line.