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From: grr@cbmvax.cbm.UUCP (George Robbins)
Newsgroups: net.micro.amiga
Subject: Re: Amiga problem -- Modem and Online!
Message-ID: <764@cbmvax.cbmvax.cbm.UUCP>
Date: Tue, 23-Sep-86 03:29:22 EDT
Article-I.D.: cbmvax.764
Posted: Tue Sep 23 03:29:22 1986
Date-Received: Tue, 23-Sep-86 18:53:58 EDT
References: <5469@decwrl.DEC.COM>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Organization: Commodore Technology, West Chester, PA
Lines: 25

In article <5469@decwrl.DEC.COM> macdonald@author.dec.com (At long last ...) 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.

10 to 1 you've got a ribbon cable or 25 wire cable between your Amiga and
modem, huh?

Pins 15 and 16 of the RS232 connector have the Audio-In and Audio-Out signals
for use in voice/modem/answering machine thingies.  If some signal is connected
to these, or the wires parallel other wires, you can pick up unpleasant amounts
of noise at your speaker.

In general your cable should connect no more than pins 1-8 and 20, unless you
have some specific purpose in mind...
-- 
George Robbins - now working for,	uucp: {ihnp4|seismo|caip}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@seismo.css.GOV
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)