Total number of PostScript pages printed by the device.
Additional information:
This object is only supported if the PostScript
option is installed.
In LaserJet 4050 Series the count is kept in NVRAM, and the
NVRAM value is updated at least every 10
sheets. NOTE: The value returned by this object will
be incremented every sheet but if power is lost between
NVRAM updates up to 9 sheets of the count may be
lost. The counter will be reset to zero
after 16,777,215 (2^24-1) pages.