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From: kabra437@pallas.athenanet.com (Ken Abrams)
Newsgroups: comp.dcom.telecom
Subject: Re: Data Lines vs. Voice Lines
Message-ID: <12664@accuvax.nwu.edu>
Date: 26 Sep 90 21:56:48 GMT
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In article <12490@accuvax.nwu.edu> stox@balr.com (Ken Stox) writes:

>	2) Once digitized at the C.O., the digital data from your
>phone call is blocked into packets of data which are routed through
>the phone network.

This has been explained in some detail in earlier posts but I think a
quick recap is in order.  While what Mr. Stox says might be true (to
some degree) sometime in the not too distant future, it is NOT true
today.  As far as I know, there are no telco owned switches in service
today that use packet switching for voice.  At the present time, a
path through a digital switch used for voice grade communications is
not pre-emptable.  Time division multiplexing is NOT the same as
packet switching.  A voice grade call gets a "full time" channel
regardless of what is transported, voice, data or even silence.


Ken Abrams        uunet!pallas!kabra437
Illinois Bell     kabra437@athenanet.com
Springfield       (voice) 217-753-7965