Path: utzoo!attcan!uunet!lll-winken!scooter!neoucom!wtm
From: wtm@neoucom.UUCP (Bill Mayhew)
Newsgroups: comp.dcom.modems
Subject: Re: DSP for V.32?
Message-ID: <1399@neoucom.UUCP>
Date: 9 Nov 88 00:36:25 GMT
References: <1398@neoucom.UUCP> <23@jove.dec.com> <10351@bigtex.cactus.org>
Organization: Northeastern Ohio Universities College of Medicine
Lines: 19


I wonder if the DSP used in the Trailblazer modems could be pushed
hard enough to manage v.32.  Several people who seemed to know
emailed me that the Motorola 56K DSP should be able to process a
9600 bps v.32 link.  The Moto chip is quite a bit more potent than
the TI DSP chip in the Trailblazer, I believe.

One compromise might be to offer a spoofing mode in the Trailblazer
that implements v.32 up the 4800 bps fallback speed.  When
negotiating the connection, the Trailblazer could be set up to ask
for a fallback even if the line is good.  This, of course, presumes
that 4800 is easier to process than 9600 (which may or may not be
true).

While not the ultimate pizza, such a mode would allow the rest of us
souls with TBs and TB+s to at least hold a coffee clatch with the
modems that a certain party at portal says we should be interested
in talking to.

--Bill