Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde!uunet!sjsca4!makalu!grimesg
From: grimesg@makalu (George Grimes)
Newsgroups: comp.unix.wizards
Subject: Re: FCC doing it again...
Message-ID: <1989Dec6.005742.18125@sj.ate.slb.com>
Date: 6 Dec 89 00:57:42 GMT
References: <1989Nov28.011514.4193@virtech.uucp> <246@cfa.HARVARD.EDU> <1989Dec2.070734.3853@stb.uu.net>
Reply-To: grimesg@makalu.UUCP (George Grimes)
Organization: Schlumberger ATE, San Jose, CA
Lines: 30

In article <1989Dec2.070734.3853@stb.uu.net> michael@stb.uu.net (Michael Gersten) writes:
>This may sound like a dumb question, but...
>
>How can the phone company multiplex any conversation, voice or modem?
>The phone company does not know ahead of time when there will be
>silence on the line, both are sampled at the same frequency, so there
>is the same total amount of data to be sent off, so they should be
>identical for multiplexing purposes, right?
>
>Or am I missing something very important here?
>
>			Michael
Yes, you are missing something very important.  There is no requirement for
predictable periods of silence for multiplexing.  Find a book with a 
description of time division multiplexing and read it. 

George


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