Modem cables pinout

serial interface cable

9 pin D-SUB female connector
to the Computer

Modem DSUB9 to DSUB25 cable

	Female	Male
Shield		1
Transmit Data	3	2
Receive Data	2	3
Request to Send	7	4
Clear to Send	8	5
Data Set Ready	6	6
System Ground	5	7
Carrier Detect	1	8
Data Terminal Ready	4	20
Ring Indicator	9	22

Modem DSUB25 to DSUB25 cable

	Female	Male
Shield Ground	1	1
Transmit Data	2	2
Receive Data	3	3
Request to Send	4	4
Clear to Send	5	5
Data Set Ready	6	6
System Ground	7	7
Carrier Detect	8	8
Data Terminal Ready	20	20
Ring Indicator	22	22

25 pin D-SUB male connector
to the modem

Pinouts.ru > Serial interfaces cables and converters schemes listing > Pinout of Modem cables and layout of 9 pin D-SUB female connector and 25 pin D-SUB male connector	Document status:	correct
Source(s) of this and additional information: Hardware Book, S�ren Graversen	7 reports
Last updated at Wed Oct 25 2006. Submit additions or corrections for this document.	Is this document correct or incorrect? What is your opinion?

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