Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site ecsvax.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!decvax!mcnc!ecsvax!taylor
From: taylor@ecsvax.UUCP (Steven Taylor)
Newsgroups: net.dcom
Subject: Re: Packetized Voice
Message-ID: <1202@ecsvax.UUCP>
Date: Wed, 8-May-85 22:36:09 EDT
Article-I.D.: ecsvax.1202
Posted: Wed May  8 22:36:09 1985
Date-Received: Fri, 10-May-85 23:54:10 EDT
References: <354@ttidcb.UUCP>
Organization: NC Educational Computing Service
Lines: 20

There is a short article about packetized voice in the February '85
issue of Data Communications (p.45).

Technically, there is really no good reason the voice can't be packetized,
the primary questions are simply questions of bandwidth and economics.

The typical data rates for 'digitized voice', which would have to be used,
are on the order of 16 to 32 kbps.  Most packet switches available today
have maximum data rates available for inter-nodal transfer at 56 kbps.
Since packet switching is based on the probability that a large number of
users can simultaneously share a circuit if there is a large enough
group and the composite rates are sufficiently high, it is very probable
that the data rate of the packet switch will have to be on the order of
1.5 mbps (T-1) for packetized voice to work well.  Otherwise, the inherent
delay caused by the sharing of the facilities will be intolerable.

Evidently, there is also some degree of reluctance to push this development
as fast as possible because of the questionable economics of building
such a fast voice switch when enormous bandwidth is available from sources
such as fiber optic cable.