Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!apple!claris!aimt!tinle
From: tinle@aimt.UU.NET (Tin Le)
Newsgroups: comp.dcom.modems
Subject: Re: Telebit ROM upgrade
Summary: Telebit ROM upgrade
Message-ID: <3151@aimt.UU.NET>
Date: 9 Dec 89 19:04:28 GMT
References: <1679@ultb.isc.rit.edu> <1989Dec2.155322.23732@virtech.uucp>
Organization: AIM Technology, Santa Clara, CA
Lines: 30

In article <1989Dec2.155322.23732@virtech.uucp>, cpcahil@virtech.uucp (Conor P. Cahill) writes:
> In article <1679@ultb.isc.rit.edu>, jjw7384@ultb.isc.rit.edu (J.J. Wasilko) writes:
> > I saw (with much envy) that Telebit continues to support newer protocols
> > with ROM upgrades. I was wondering if anyone had heard if Microcom
> > intends to support V.32 on their AX/9624c modems?
> 
> Nobody has a rom upgrade to take a 2400 baud modem to 9600 baud v.32.  Not
> telebit, Not microcom, not anybody.

Agreed, but a Telebit Trailblazer is 9600 already and a TB+ is approx 19.2K
(actually 18K+).  So it might be possible that Telebit only needs a ROM
upgrade to get it to recognize V.32 besides its own protocol.

> 
> V.32 requires lots more hardware (part for trellis encoding, part for
> echo cancellation, etc.) than v.22bis modems.

I believe Telebit uses trellis encoding in their multi-channel scheme (they
divide the telephone band into 512 channels).  Anyway, I have a TB+ but have
not upgraded the ROM in it so I don't know if that's all I need to get V.32
If that is so, I'd be a happy camper :>.  Justified the large sum of money
(it was for me at the time) I spent on the TB+.

-- Tin Le

-- 
Tin Le                    |  UUCP: {wyse, claris, uunet}!aimt!tinle
Sr. Software Engineer     |  Internet: tinle@aimt.uu.net
AIM Technology            |
Santa Clara, CA 95054     | "'tis an ill wind that blows no mind..."