Path: utzoo!mnetor!uunet!husc6!mailrus!ames!pasteur!ucbvax!SIMTEL20.ARPA!W8SDZ
From: W8SDZ@SIMTEL20.ARPA (Keith Petersen)
Newsgroups: comp.sys.ibm.pc
Subject: null modem (DB9<-->DB25 connections)
Message-ID: <KPETERSEN.12383755485.BABYL@SIMTEL20.ARPA>
Date: 20 Mar 88 06:40:00 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Lines: 23

From the archives at SIMTEL20...

		 A p p l i c a t i o n	   N O T E

Following  is a schematic diagram for the construction of a cable
which connects the PC/AT's 9-pin serial I/O port to devices using
a standard DB-25-pin connector:

	  AT Serial	     Name	      DB-25 connector
	       1	      CD		       8
	       2	      RD		       3
	       3	      TD		       2
	       4	      DTR		       20
	       5	      SG		       7
	       6	      DSR		       6
	       7	      RTS		       4
	       8	      CTS		       5
	       9	      RI		       22

--Keith Petersen
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