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Path: utzoo!linus!decvax!harpo!floyd!vax135!cornell!uw-beaver!ubc-visi!alberta!chris
From: chris@alberta
Newsgroups: net.micro
Subject: Re: more telephone-modem problems
Message-ID: <380@alberta.UUCP>
Date: Fri, 15-Jul-83 05:36:24 EDT
Article-I.D.: alberta.380
Posted: Fri Jul 15 05:36:24 1983
Date-Received: Fri, 15-Jul-83 22:05:08 EDT
References: ihuxl.433
Lines: 15

I had a similar problem with my modem (Racal Vadic VA3451AD) as that reported
here and earlier: it would work fine without the phone or with a friend's
Radio Shack hand-held, but it wouldn't work with my touch-tone phone. After
mucking around, I finally found the problem, which may be a common one. The
telephone and modem only use two of the wires in the 4-pin connector. The
modem considers the other two to be a data control signal. My phone didn't
do anything with these wires, but it did have them both attached to the
same otherwise unused screw terminal - it had connected them together. I
moved one of the wires to another unused terminal, and the problem with
the modem vanished. Ma Bell, etc. would prefer you didn't fiddle with your
phone, so you can do the same thing by cutting one of the wires in your
modem cord (or disconnect it inside the modem). Hope this helps.

       Chris Gray
       ...!uw-beaver!ubc-vision!alberta!chris