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From: res@colnet.uucp (Rob Stampfli)
Newsgroups: comp.dcom.modems
Subject: hayes command set for reliable connects
Message-ID: <1991Mar12.034943.10592@colnet.uucp>
Date: 12 Mar 91 03:49:43 GMT
Organization: Little to None
Lines: 35

I own an Intel 9600ex modem.  The instructions are not too clear about the
following commands, which deal with reliable mode.  Could someone expand on
what the following commands do:

1.	AT\O -- originate reliable link
2.	AT\U -- accept reliable link
3.	AT\Y -- switch to reliable mode
4.	AT\Z -- switch to normal mode

These are purported to be used after the connection is initially established.
I could understand AT\Y and AT\Z if there were no AT\O or AT\U, but obviously
there is something I don't understand.

Also, the 9600ex gives three options for dealing with how the modem handshakes
to establish a reliable connection.  These are:

1.	AT\C0 -- If a reliable connection is made, no buffering occurs, and
		the fallback character detection is disabled.  (Default)
2.	AT\C1 -- The modem buffers data until either 200 normal characters
		are received or a reliable character is received within three
		seconds of making a connection.  If the modem receives 200
		normal characters, it makes a normal connection (no error
		control).  No buffering occurs and the modem passes data to
		the computer as soon as the modem receives the data.  If the
		modem receives a reliable character, it initiates a reliable
		connection, and the fallback character detection is disabled.
3.	AT\C2 -- If a reliable connection is made, no buffering occurs.  If
		the modem detects the fallback character, it falls back to
		normal mode.

Which method is most commonly used?  What is a "reliable character"?

Thanks in advance,
-- 
Rob Stampfli, 614-864-9377, res@kd8wk.uucp (osu-cis!kd8wk!res), kd8wk@n8jyv.oh