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From: lstowell@pyrnova.pyramid.com (Lon Stowell)
Newsgroups: comp.dcom.modems
Subject: Re: Data rate detection
Message-ID: <130559@pyramid.pyramid.com>
Date: 17 Oct 90 00:43:45 GMT
Sender: news@pyramid.pyramid.com
Reply-To: lstowell@pyrnova.pyramid.com (Lon Stowell)
Organization: Pyramid Technology Corp., Mountain View, CA
Lines: 9

Answer--Autobaud procedures.  Typically the dialer hits the CR
key repeatedly until the prompt appears correctly.  The Diallee
starts the baud rate at a default value and examines the
received character along with parity error, false start, and
framing error status bits from the hardware.  By these and a
simple look-up table, the correct baud rate can be determined.
If the range is fairly simple...say 2400-9600, it is possible to
determine parity and bits/character as well.  Over wider ranges
it gets pretty tricky.