Path: utzoo!attcan!uunet!ncrlnk!ncrcae!hubcap!gatech!uflorida!haven!umbc3!cbw1!brian
From: brian@cbw1.UUCP (Brian Cuthie)
Newsgroups: comp.dcom.modems
Subject: Re: Who cares what it is, if it saves $$?
Keywords: save money
Message-ID: <113@cbw1.UUCP>
Date: 8 Nov 88 17:29:41 GMT
References: <1398@neoucom.UUCP>
Reply-To: brian@cbw1.UMD.EDU (Brian Cuthie)
Organization: CBW, Columbia, MD 21046
Lines: 37

In article <1398@neoucom.UUCP> wtm@neoucom.UUCP (Bill Mayhew) writes:
[much stuff deleted]
>
>Anybody with DSP experience know if that TI DSP chip in the T1000
>is up to the task of implementing v.32?  If so, the upgrade to v.32
>for the T1000 shouldn't be too expensive.  The upgrade from level 3
>to level 4 was about $100 for the older Trailblazer models.  I
>popped the cover off the Codex v.32 modem.  There were a whole bevy
>of DSP chips in there.  I think there were 6, but they were an
>older part type.
>
>--Bill


Even though you didn't specify which of the TI DSP chips was in the T1000, I
can tell you that even if it's the 320C25 (TI's most powerful) that it
cannot be done.   Actually, to my knowledge, no one has been able to
impliment V.32 in anything less than two 320C25s.  In fact UDS uses six (yes
6!) NEC 7720 DSPs.

As I stated in an earlier posting V.32 requires echo cancellation which is a
CPU HOG.  It cannot be done on *any* of the trailblazers currently available
and there is no hope that you will be able to upgrade a current product 
to do V.32 in the future.  This however would not stop me from buying a
trailblazer.  

V.32 is new and someone has already posted an arcticle about
problems with his UDS modem.  I personally will use a TB+ for a year until V.32
is stable and fewer $$$.  Then I'll buy one for a total investment of less 
money for both modems than I would have made today for a V.32 alone.

-brian


-- 
Brian D. Cuthie                                 uunet!umbc3!cbw1!brian
Columbia, MD                                    brian@umbc3.umd.edu