Modems on the 3000 have been a pain since the MPE/VE terminal I/O
rewrite that prevented a program from opening a port unless the
attached modem was indicating Carrier Detect.  This made it
impossible to setup a modem that could simultaneously be used for
dial-in where the session would log off if the modem disconnected
*and* the modem would disconnect when the user logged off *and* a
program on the 3000 could open the port to dial out through the
modem.

Now I have in front of me the "COMMUNICATOR 3000 MPE/iX-Express 2
(PowerPatch Tape C.55.02) Based on Release 5.5" manual which came
in the mail the other day.  On page 2-11, under "New Functionality
Supported in DTS/TIO", under "New Features", is says:

  "Three new modem types for attached device.  The new modem types
   are US modem In Out, European modem In Out, and Five wires modem."
                ^^^^^^                 ^^^^^^

Can this be what it sounds like?

There is no further explanation of what these new modem types actually
do, other than a mention that they are only supported on the DTC 72MX,
DTC 16iX, and DTC 16MX.

G.