Path: utzoo!utgpu!attcan!lsuc!ncrcan!hcr!ted
From: ted@hcr.UUCP (Ted Law)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Call waiting and modems??
Message-ID: <4051@hcr.UUCP>
Date: 6 Oct 88 14:17:46 GMT
References: <8876@watdragon.waterloo.edu>
Reply-To: ted@hcr.UUCP (Ted Law)
Organization: HCR Corporation, Toronto
Lines: 24

In article <8876@watdragon.waterloo.edu> sjflim@trillium.waterloo.edu (SJF LIM) writes:
>I have a Call waiting feature installed on my phone, (assume everybody knows
>what is Call waiting), this is a very nice feature because I don't have to
>worry about "busy" tone to the person who is calling me.  Until I've found
>out that Calling waiting and modem cannot exist together.  The problem is 
>when someone calls and I am using modem the telephone signal will disconnect 
>my modem from the phoneline.  Is there anyway that I can by pass the Call
>waiting feature or temperory disconnect this feature?  Any input will be 
>helpful.
>
>                                                    SJF Lim.

The modem disconnects because the call waiting beep interrupts the carrier
that the modem is constantly monitoring.  I think there is a software
changeable parameter on the modem that controls the number of deci-seconds
to delay on loss of carrier before the modem hangs up.  Changing this
parameter to a value that is longer than the call waiting beep should make
your modem ignore any incoming call, even though you will still get
a few garbage characters on your terminal.

----------------------------------------------
Ted Law			{utzoo,utcsri}!hcr!ted
HCR Corporation		(416)922-1937
Toronto, Canada