HP Color LaserJet 5500 Technical Reference Manual page 154

7-46 Status Readback Commands
@PJL USTATUS PAGE<CR><LF>
100<CR><LF>
<FF>
@PJL USTATUS JOB<CR><LF>
END<CR><LF>
NAME="End of Recovery"<CR><LF>
PAGES=75<CR><LF>
<FF>
The unsolicited page status indicates that the 100th page
printed (25 processed in non-printing mode and 75 printed
pages). The job status indicates that the EOJ command was
received and that 75 pages were printed in the recovery job.