Path: utzoo!attcan!uunet!van-bc!skl
From: skl@van-bc.UUCP (Samuel Lam)
Newsgroups: comp.dcom.modems
Subject: Re: need volksmodem dip-switch definitions
Summary: Here is what the switches does
Keywords: Volksmodem 12 DIP switches
Message-ID: <1868@van-bc.UUCP>
Date: 8 Sep 88 09:41:43 GMT
References: <689@vedge.UUCP>
Organization: Balliffe Consulting, Vancouver, B.C., Canada
Lines: 26

In article <689@vedge.UUCP>, lai@vedge.UUCP (David Lai) wrote:
>I have a volksmodem 1200 baud.  It has a couple of dipswitches that
>are visible from behind the modem.  ...  I was wondering
>what the dipswitches mean... especially which switch should I use to
>shut off autoanswer.

If you are looking at the modem from the back, the left DIP switch
controls if the modem will always force DCD high on the serial cable,
and the right DIP switch controls if the modem pays any attention to
the signal on the DTR line of the serial cable.  For example:

Left DIP switch up:	Modem always keep DCD high
Left DIP switch down:	DCD reflects carrier-detect status in modem

Right DIP switch up:	Modem ignores the status of DTR
Right DIP switch down:	DTR can be used to put modem on/off line

The modem command "ATS0=0" can be used to tell the modem to not
auto-answer.  Note that this setting is lost if the modem is
powered down.

The modem will also not answer the phone when the right DIP switch is
in the down position and the DTR line is low.

-- 
Samuel Lam     {alberta,watmath,uw-beaver,ubc-vision}!ubc-cs!van-bc!skl