Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!cs.utexas.edu!romp!auschs!d75!ken From: ken@kdillman.austin.ibm.com (/32767) Newsgroups: comp.dcom.modems Subject: Re: RS232 to modem connection Keywords: RS232 DTE cable Message-ID: <2692@d75.UUCP> Date: 14 Sep 89 22:22:56 GMT References: Sender: news@d75.UUCP Organization: IBM AWD, Austin, TX Lines: 15 A previous post indicates that DTE to DTE connections use a "straight through" cable. This type of cable won't work because you'll have both devices shouting at each other on the same wire and listening for each other on the same wire. In most cases the following will work between DTE's: Side A Side B 1 1 2 3 3 2 4 5 5 4 6 20 7 7 20 6 If the DTE needs to see Carrier Detect on pin 8, the safest way is to loop pin 6 to pin 8 on both sides. This cable will almost always connect a DTE to another DTE and make both happy (assuming of course that we're talking async here). Sync is only a matter of another couple of pin swaps to get the sync timing signals cross connected properly.