Path: utzoo!censor!geac!torsqnt!hybrid!scifi!bywater!uunet!hayes!tnixon
From: tnixon@hayes.uucp
Newsgroups: comp.dcom.modems
Subject: Re: V32bis
Message-ID: <3730.27910819@hayes.uucp>
Date: 14 Jan 91 01:23:37 GMT
References: <19700002@inmet> <3713.27832d53@hayes.uucp> <87110@tut.cis.ohio-state.edu> <3722.278c7fbc@hayes.uucp> <6130@khaki8.UUCP> <89275@lll-winken.LLNL.GOV> <1991Jan12.161258.19986@santra.uucp>
Organization: Hayes Microcomputer Products, Norcross, GA
Lines: 39

In article <1991Jan12.161258.19986@santra.uucp>, jjj@blob.hut.fi
(Joni Jaakko J{rvenkyl{) writes: 

> In article <89275@lll-winken.LLNL.GOV> casey@gauss.llnl.gov (Casey Leedom) writes:
>>| 	Because the HST does not have too cancel it's own echo, it can
>>| train/retain is milliseconds instead of seconds.
>>
>>  The long retrain problem has been essentially solved with V.32bis.
> 
> And US Robotics' got this nice feature called ALS, which offers the
> possibility of shifting the speed also upwards, when line conditions get
> better! With a normal V32bis modem you get only downwards speed shifting,
> which may reduce the effectivity of data transfer very much.

This is baloney; regurgitated USR public relations crap.  V.32bis 
supports changing dynamically between any of its five rates!  Any 
V.32bis modem can change rates UP OR DOWN.  The question is whether 
or not a given implementation will _initiate_ a speed change, and 
the _criteria_ upon which it will initiate the change.  Because of 
the large number of applications in which V.32bis modems will be 
used (e.g., async non-error-control where changing speeds is 
explicitly not possible, likewise with synchronous applications 
where the DTE provides the clock), the criteria and initiation 
decision are left up to the modem and its implementor.  All USR has 
done is make a decision to permit their modems to initiate changes 
and, apparently, decided on some criteria on which to base this.  
Every other V.32bis modem manufacturer will make a similar decision! 

It really irks me to see a company whose Vice President of 
Engineering (Dale Walsh of USR) sat in on all of the V.32bis 
discussions and agreed to them, turn around and flat out 
misrepresent what the standard says, and claim some unique "feature" 
that, in reality, is not going to be unique at all.

-- 
Toby Nixon, Principal Engineer    | Voice   +1-404-449-8791  Telex 151243420
Hayes Microcomputer Products Inc. | Fax     +1-404-447-0178  CIS   70271,404
P.O. Box 105203                   | UUCP uunet!hayes!tnixon  AT&T    !tnixon
Atlanta, Georgia  30348  USA      | Internet       hayes!tnixon@uunet.uu.net