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: V32bis
Message-ID: <2647@hayes.uucp>
Date: 6 Nov 90 13:09:09 GMT
References: <90309.054925KPURCELL@LIVERPOOL.AC.UK>
Organization: Hayes Microcomputer Products, Norcross, GA
Lines: 27

In article <90309.054925KPURCELL@LIVERPOOL.AC.UK>,
KPURCELL@LIVERPOOL.AC.UK writes: 

> 1. What is V32bis (I'm familiar with V32, V42, V42bis, PEP, etc ... )

V.32bis is a new standard that is presently in the process of being 
adopted under accelerated procedures in the CCITT.  It received 
unanimous support from Study Group XVII, and is now being translated 
into the official CCITT languages so that it can be mailed to all 
CCITT member countries for the official written ballot.  The ballot 
will close around the end of February 1991, at which time if 70% of 
the ballots returned are affirmative, V.32bis will be an official 
CCITT standard.

V.32bis is an upwardly-compatible extension of V.32.  To the 
original V.32 speeds of 4800 and 9600, it also adds new speeds of 
7200, 12000, and 14400 bps, all with trellis-coding, and all 
full-duplex.  It also adds "rapid rate renegotiation", which allows 
the modems to respond to changing line conditions by increasing or 
decreasing the speed in less than 1/10th of a second rather than 
taking five to ten seconds to do a full retrain.

-- 
Toby Nixon, Principal Engineer    | Voice   +1-404-449-8791  Telex 151243420
Hayes Microcomputer Products Inc. | Fax     +1-404-447-0178  CIS   70271,404
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