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From: G.MDP@score.stanford.edu (Mike Peeler)
Newsgroups: comp.sys.misc
Subject: Re: Pending FCC ruling threat to modem users
Message-ID: <2067@brl-adm.ARPA>
Date: Wed, 31-Dec-86 02:36:00 EST
Article-I.D.: brl-adm.2067
Posted: Wed Dec 31 02:36:00 1986
Date-Received: Wed, 31-Dec-86 05:36:07 EST
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In article <14178@amdcad.UUCP> phil@amdcad.UUCP (Phil Ngai) writes:
>I don't think there are any long distance carriers who care, at least,
>that I have heard of. And that is where things like echo suppression
>and TASI come into play.

Right.  Echo suppression does show, however, that data calls
must be detectable...

For those who don't know what we're talking about, there's a
little device on long-distance lines called an echo-suppressor
that briefly cuts off your signal so you don't get an echo,
which telephony research has found tends to be a bit unsettling
to the person speaking.  On a data call, this loss of signal
tends to be interpreted as carrier drop, so naturally there's
another little device called an echo-suppressor suppressor.

The moral is, when you make a data call, TPC knows...
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