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From: cmcmanis@sun.uucp (Chuck McManis)
Newsgroups: net.micro.amiga
Subject: Re: Amiga problem -- Modem and Online!
Message-ID: <7513@sun.uucp>
Date: Mon, 22-Sep-86 19:06:28 EDT
Article-I.D.: sun.7513
Posted: Mon Sep 22 19:06:28 1986
Date-Received: Tue, 23-Sep-86 06:01:09 EDT
References: <5469@decwrl.DEC.COM>
Organization: Sun Microsystems, Inc.
Lines: 25

Paul MacDonald at decwrl writes :

> I have a problem. Perhaps someone out there has a solution?
> 
> I am using an Amiga with a Sony 1311 Monitor, a DEC DF224 "Scholar"
> modem, and the Online! V1.27 telecommunications software. When everything
> is hooked up and running, there is a loud tone in the speaker of the
> Sony which increases and decreases with changes in the volume control.
> It appears to be an audio signal fed directly into the monitor through
> the serial port somehow. When I remove power from the modem, the sound
> disappears.
> 
This is exactly what is happening, if you look at the serial connector
description in your Amiga  manual (the one that has the Amiga Basic
manual in it too) you will note several odd signals on the serial
connector, not the least of which are "Audio In", "+5V", and I believe
+ and - 12V. Check what your modem thinks these lines are supposed
to be. If possible replace your modem cable with one that only connects
lines 1-7 and 20. That will avoid damaging both your modem and possibly
your Amiga.

-- 
--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.