TANDBERG 550 MXP User Manual page 73

Mode
The Data port supports 2 different modes:
Control The control interface provided by the data port supports a subset of the Hayes
command set as well as a comprehensive set of system specific commands.
This mode maintains communication with the data port's command interpreter at
all times. All features available from the hand-held remote control can be
accessed through the data port.
Modem
Allows you to control the system externally via a PC as in Control Mode. Once a
call is established, Data port 1 will automatically switch to Data mode. When the
call disconnects, Data port 1 switches back to Control Mode.
Settings
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