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From: lstowell@pyrnova.pyramid.com (Lon Stowell)
Newsgroups: comp.dcom.modems
Subject: Re: V32 vs. HST
Message-ID: <142068@pyramid.pyramid.com>
Date: 23 Jan 91 02:47:30 GMT
Sender: daemon@pyramid.pyramid.com
Reply-To: lstowell@pyrnova.pyramid.com (Lon Stowell)
Organization: Pyramid Technology Corp., Mountain View, CA
Lines: 44

In article <2114@proxima.UUCP> lucio@proxima.UUCP (Lucio de Re) writes:
>In article <3732.27958db2@hayes.uucp> tnixon@hayes.uucp writes:
>>In article <2695@maestro.htsa.aha.nl>, beo@maestro.htsa.aha.nl (Jan
>>-BeO the PeO- van Veen) writes: 
>>
>>> Just a ignorant question:
>>>   If I would hook a V32 modem upto a HST modem, what would
>>>   be the Maximum baudrate?
>>
>>They wouldn't connect at all.  The HST doesn't have V.32 modulation. 
>
>I beg to differ. The V.32 specification demands the ability to
>fallback to V.22bis, of which the HST is certainly capable. It
>will be necessary to program the modems to match, but essentially
>2400bps is possible.
>
   Actually, the '84 version of the V.32 recommendation which I
   am holding in front of me, makes no such statement.

   Operation of V.32 at 2400 bps is "for further study"....and
   this would not be V.22bis (Toby can likely comment on the '88
   version...) which is a separate recommendation entirely.

   Many V.32 modems offer V.22 and V.22bis as an option....most
   of the ones that I have seen allow the V.22 rates to be
   disabled by configuration...   Some V.32 modems don't offer
   2400 bps at all--particularly many of the European
   homologated units--which fully conform to V.32.   V.32
   doesn't even require 4800 or even 9600....  "any combination
   of the following data signalling rates may be implemented in
   the modem:

      9600 bit/sec synch

      4800 bit/sec synch

      2400 bit/sec sync is for further study"


      (Async mode is ALSO for further study in the '84 version,
      even though many vendors offered it prior to the '88
      version getting to draft stage.....)
      o