X.21 DB25 to DB15 pinout

serial interface cable

Pin Name	Pin Number	Direction	Pin Number	Pin Name	Description
	2	-?-	2		Transmit A
	3	-?-	4		Receive A
	4	-?-	3		Control A
	6	-?-	12		Indication B
	7	-?-	8		signal ground
	8	-?-	5		Indication A
	14	-?-	9		Transmit B
	15	-?-	6		Signal timing A
	16	-?-	11		Receive B
	20	-?-	10		Control B
	21	-?-	13		Signal Timing B

I use this pinout to connect a DB25 interface of a router to a DB15 port of a modem

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15 pin D-SUB male connector

Pinouts.ru > Serial interfaces cables and converters schemes listing > Pinout of X.21 DB25 to DB15 and layout of 25 pin D-SUB male connector and 15 pin D-SUB male connector	Is it correct?:	unknown
Source(s) of this and additional information: , http://www.arcelect.com/X21_interface.htm Contributor: Urban, Christian C.	no reports
Last updated 2010-01-14 22:45:41. Edit this page.	Is this document correct or incorrect? What is your opinion?

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