Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!hayes!tnixon
From: tnixon@hayes.uucp (Toby Nixon)
Newsgroups: comp.dcom.modems
Subject: Re: 19200 bidirectional extension to V.32 bis.
Message-ID: <1895@hayes.uucp>
Date: 9 Oct 90 11:41:05 GMT
References: <1990Oct7.221627.12252@larouch.uucp> <69427@lll-winken.LLNL.GOV>
Organization: Hayes Microcomputer Products, Norcross, GA
Lines: 31

In article <69427@lll-winken.LLNL.GOV>, casey@gauss.llnl.gov (Casey
Leedom) writes: 

> / From: jparnas@Larouch Headquarters.UUCP (Jacob Parnas)
> | 
> | I heard that there is a proposal for a extension to V.32bis that will
> | have throughputs of 19200 baud without compression and up to 76800 with
> \ compression.  Does anyone have any more information about this proposal?
> 
>   To be honest I doubt that your information is correct...

Sorry, but I must have missed Jacob's original message.  He is, in 
fact, correct -- CCITT Study Group XVII has indeed initiated a 
project to define the "ultimate modem" -- one that will operate full 
duplex on dial-up telephone lines at rates exceeding 14,400bps.  The 
proposals so far call for operation at 19,200 or above, with some of 
the proposals talking about 24,000bps -- and this is WITHOUT 
COMPRESSION (i.e., a synchronous host would be able to acheive these 
speeds, full-duplex).  Telebit's multicarrier modulation is a 
contender, but they have yet to demonstrate that they can do a 
multicarrier echo canceller so it will run full-duplex; other 
old-line modem companies with big research budgets, like Codex and 
General Datacom and Racal-Milgo will likely lead this project.

	-- Toby

-----------------------------------------------------------------------------
Toby Nixon, Principal Engineer     Fax:    +1-404-441-1213  AT&T:     !tnixon
Hayes Microcomputer Products Inc.  Voice:  +1-404-449-8791  CIS:    70271,404
Norcross, Georgia, USA             BBS:    +1-404-446-6336  MCI:       TNIXON
UUCP:   ...!uunet!hayes!tnixon     Internet:        hayes!tnixon@uunet.uu.net