Path: utzoo!mnetor!uunet!husc6!bloom-beacon!gatech!psuvax1!burdvax!bpa!cbmvax!grr
From: grr@cbmvax.UUCP (George Robbins)
Newsgroups: comp.dcom.modems
Subject: Re: Telebit -- thanks
Message-ID: <3285@cbmvax.UUCP>
Date: 9 Feb 88 06:34:53 GMT
References: <626@ddsw1.UUCP> <3276@cbmvax.UUCP> <14591@pyramid.pyramid.com>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Organization: Commodore Technology, West Chester, PA
Lines: 24

In article <14591@pyramid.pyramid.com> csg@pyramid.UUCP (Carl S. Gutekunst) writes:
> In article <3276@cbmvax.UUCP> grr@cbmvax.UUCP (George Robbins) writes:
> >Also the modems *will* auto-baud to 19200, but you have to send the AT
> >string as A\dT or your local equivalent of sending a delay.
> 
> The correct way to autobaud a TrailBlazer is to repeatedly send 'A' until the
> 'A' echos. Then send the 'T'. Alternatively send A\dA\dA\dA\dAT.

Yes, but the key seem to be that there must be some delay between the A's.
In my testing just blasting out a stream of A's a 19200 baud didn't work,
at least for cases like AAAAAAAAAAAAAAAAAAAT.

Close reading of the manual also indicates that if the modem has already
auto-bauded to some other speed, you will have to send it a break, or
otherwise cause a framing error to put it in a mode where will try to
auto-baud again.

This is unlike most hayes style modems, which generally try to sense
the baud rate any time they are waiting for an AT sequence.

-- 
George Robbins - now working for,	uucp: {uunet|ihnp4|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@uunet.uu.net
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)