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From: amb@ai.mit.edu (Andrew Boardman)
Newsgroups: comp.dcom.telecom
Subject: Re: Call-Waiting Disable
Message-ID: <14618@accuvax.nwu.edu>
Date: 12 Nov 90 14:18:29 GMT
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X-Telecom-Digest: Volume 10, Issue 814, Message 3 of 10


>[Moderator's Note: This of course simply sets one of the S Registers
>to a longer time out value ... long enough that the call waiting tone
>won't disconnect you, although it may very well damage the data
>getting transferred at the same moment. The other hangup (pun intended) 
>...how do you get the *other end* to hang around for those
>milliseconds while you are gone?

Most dialup services in my neck of the woods do configure their modems
in this manner.

Consider: when making a voice call, the CW tone momentarily disrupts
the connection with noise.  You have the option of ansewring or
ignoring.  When making a data call, you still get a disruptive burst
of noise, allowing you the option of terminating your connection
gracefully to answer or ignoring it.  The functionality is maintained.