Date   : Mon, 04 Apr 1983 20:46:00 EST
From   : Robert L. Plouffe <PLOUFF@mit-mc.arpa>
Subject: ctl E & O (no problem)

Take a look at the versions of modem7xx and MDM70x that have a three letter
command at the modem command line that toggles the program to allow the
sending of control characters. The commsnd is 'TLC". When thusly toggled,
you must enter a contr-^ and then control E or O to do local modem
commands. Otherwise, contro characters will have no affect on your
modem terminal operation....Neat, huh?