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Posting-Version: version B 2.10.1 6/24/83; site wu1.UUCP
Path: utzoo!linus!philabs!cmcl2!rocky2!cubsvax!wu1!rf
From: rf@wu1.UUCP
Newsgroups: net.dcom
Subject: Charges for modem usage (correction)
Message-ID: <187@wu1.UUCP>
Date: Mon, 31-Oct-83 18:02:13 EST
Article-I.D.: wu1.187
Posted: Mon Oct 31 18:02:13 1983
Date-Received: Sun, 6-Nov-83 19:38:13 EST
Organization: Western Union Telegraph, Mahwah, NJ
Lines: 20

Oops!  My apologies.  It appears that AT&T does use statistical
multiplexing.  It's called time averaged speech interpolation
(TASI.)

However, . . .

Our office copy of Notes on the Network (AT&T,1980) indicates
that TASI can only be used between Western Electric's Electronic
Switching Systems type 4.  According to that same volume ESS's
are used only at the higher levels of the AT&T network.  All
those levels are going to AT&T in the divesture.  The Bell
companies get only the level 5 relay-clackers.

So, . . .

The local phone companies do not use statistical multiplexing.
Its existence does not impact *their* costs at all.

			Randolph Fritz
			Western Union Telegraph