HP Color LaserJet 5500 Technical Reference Manual page 55

Effect on Unsolicited
Job Status
Related Commands:
Terminates the non-printing mode (enabled by using the
START/END options). The non-printing mode, if enabled
by the last JOB command, only applies to the previously
received data, and does not effect any future pages until
another JOB command enables the non-printing mode
again.
When the printer receives this command, it returns
unsolicited job status information, if enabled, when the last
page of the job exits the printer and is in the output tray.
The EOJ command resets the page number associated with
unsolicited page status. Resetting the page count associated
with unsolicited page status only affects future pages.
Pages already processed, but not yet printed, are not
affected.
JOB, USTATUS
Job Separation Commands 5-9