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From: BRUCE@ccavax.camb.com (Barton F. Bruce)
Newsgroups: comp.dcom.telecom
Subject: Re: TASI Acronym?
Message-ID: <11690@accuvax.nwu.edu>
Date: 4 Sep 90 19:37:19 GMT
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> circuits by freeing the circuit associated with a conversation during
> such a scheme being referred to as "TASI", but can't find this term in

TASI stands for something like: "Time Assignment Speach Interpolation"
if I remember correctly. It was expensive to implement, so was mostly
used on transatlantic cables. The old analog versions have given way
to the modern digital versions marketed to folks with large global
nets and big budgets.

Not only is no bandwidth given you in quiet periods, but also your
speech may be slightly further delayed if buffers instantaneously
backup beyong the capacity of the pipe to carry it all. When you can't
see the lips speaking, how are you to know that that pause was more
than just satelite delay? Also beginnings and ends of sylabyls may get
slightly clipped, and the human ear, wonderful thing that it is, never
misses anything.

Republic Telecom can easily give you 40 voice channels on 5 x 56kb,
with some provision for handling fools who try to sneak modem traffic
across where it does not belong. That is a small size box for them.

Folks with more modest budgets may want to check Pacific Communication
Sciences, Inc, too, if you want clever voice compression, but not
traditional TASI.