Returns an indication of the capacity of the installed
option. See SIMM1-CAPACITY for an explanation of the
meaning of the value of this object.
Additional information:
If at least one (1) external paper handling device
(EPHD) is attached to the printer, then this object
will exist, otherwise <noSuchName>
should be returned.
This object returns the number of input trays or
output bins, depending the the device type (see
PHD2-TYPE) for the first EPHD in the device chain.