Returns an indication of the type of option installed in
PHD interface 4. See SIMM1-TYPE for an explanation of
the enumerations.
Additional information:
If at least three (3) external paper handling devices
are attached to the printer, then this object will
exist, otherwise <noSuchName>
should be returned.
This object returns whether the third device is an
input device, an output device, or an unknown device which may
be developed in the future.