rts/cts - a tutorial on flow control

[Edward C. Bennett]

In article <879 at sdcsvax.UUCP>, brian at sdcsvax.UUCP (Brian Kantor) writes:
> Hayes modems, for example, use timing and a sequence of characters.  To
> disconnect an open data connection, you stop all outgoing data for 3
> seconds, send +++, and pause for another 3 seconds.  If you are already
> connected and discover that you have to send exactly that pattern for
> some reason, you are out of luck - the modem is going to disconnect and
> you can't do anything about it (oh, you could have changed the control
> characters BEFORE you connected, but once you have connected, too bad.
> You could also have disabled the feature, but then you have to have some
> other method of disconnecting the modem).
> 
> 	Brian Kantor	UC San Diego
> 
> 	decvax\ 	brian at ucsd.arpa
> 	akgua  >---  sdcsvax  --- brian
> 	ucbvax/		Kantor at Nosc 

	Go read your manual!!

	Why do you think the 3 second time is required before and after
the +++'s? Just don't let the time buildup. Enter data fast enough to prevent
a 3 second interval. Even if you do drop into command mode, it's simple to
reconnect. And while in command mode, you CAN change your escape character.
Also the number of them and the length of the pause required.

NOTE: The comments are based on ownership of a Prometheus ProModem 1200, which
	emulates a Hayes.

-- 
edward

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