Path: utzoo!attcan!uunet!abvax!iccgcc!halco
From: halco@iccgcc.decnet.ab.com
Newsgroups: comp.dcom.modems
Subject: Data Rate Detection:  Summary
Message-ID: <1654.272853f9@iccgcc.decnet.ab.com>
Date: 26 Oct 90 20:19:21 GMT
Lines: 20

A while back I posted a request for information regarding bullet-proof 
data rate detection for incoming calls.  I received 5 replies with overlapping
information, to wit:

1)  For Hayes-compatible modems, the "CONNECT xx00" message *can* be depended
on.  Setting the modem to send numeric codes rather than test messages can
simplify the software some.

2)  Alternatively, require the caller to repeatedly hit a key (usually CR).
Cycle through valid baud rates until the character is received without 
framing or parity errors.

3)  When using error-correcting modems, use the highest speed the modem will
accept and use flow-control to throttle communications.


Thanks to all who replied for the help.

						Bruce Halco
						(No cute sig yet)