Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!emory!stiatl!mnopltd!neal
From: neal@mnopltd.UUCP
Newsgroups: comp.dcom.modems
Subject: Re: direct connection of two dte devices
Message-ID: <134@mnopltd.UUCP>
Date: 17 Oct 90 01:03:53 GMT
Reply-To: gatech!stiatl!mnopltd!neal
Organization: MNOP Ltd., Atlanta, Ga.
Lines: 39
Distribution:


->In article <129281@pyramid.pyramid.com>,
->lstowell@pyrnova.pyramid.com (Lon Stowell) writes: 
->
->> Chop the extension cord in half, and then solder these pairs
->> together...
->> [deleted instructions to cross over wires and solder]
->> If the modems are dial-up, there is no real way to just hook
->> them together....
->
->Sorry, you're just wrong here!  Modems do NOT care about the 
->polarity of the Tip and Ring circuits.  You can plug two dial-up 
->modems back to back with a standard male-to-male modular cord, give 
->one an "ATD" command and the other "ATA", and they'll connect with 
->each other just fine!  I do it all the time.
->
->> BTW, why not just create a null-modem cable for the two DTE's
->> and hook them together directly?
->
->In my case, it is TOO MUCH TROUBLE to uncable all of my modems from 
->my serial ports to hook up my Mac and PC together.  To connect their 
->modems to each other, all I have to do is pull the T-connector out 
->of the wall jack, and the two modems are left hooked together as I 
->mentioned above. 

As one of the earlier posters of the one of the dumber answers to this
question (involving buying an old pbx) ...

I assumed that the original poser knew enough to do a null modem.  What 
about the situation where you need to test the ring, answer, and line loss
situation?   Like uhhh, testing a communications concentrator,  Email box
system, etc, and you don't or can't get 24 phone lines to do it?   Are 
there cheaper ways around that block?

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Neal Rhodes                       MNOP Ltd                     (404)- 972-5430
President                Lilburn (atlanta) GA 30247             Fax:  978-4741
                             emory!mnopltd!neal 
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