HP Color LaserJet 5500 Technical Reference Manual page 300

Glossary-8
Solicited Status
Solicited status is printer status information that is
specifically requested. For example, the command @PJL
INFO ID solicits the printer's ID. The printer responds
to solicited status messages as they are received. See
"unsolicited status."
Status Readback
Sending printer status information from the printer to
the host computer.
Universal Exit Language (UEL) Command
A PJL command, understood by all LaserJet personali-
ties, that prompts the active personality to finish proc-
essing the current job and exit the personality. PJL also
recognizes the UEL command and, when received, PJL
discards any unprocessed partial PJL command and
prepares to accept the next PJL command.
Unsolicited Status
Unsolicited status (USTATUS) is printer status informa-
tion sent as a result of certain printer events occurring,
such as when the printer runs out of paper, a job fin-
ishes printing, or when a certain time period elapses.
There are several types of unsolicited status (DEVICE,
JOB, PAGE, and TIMED); unsolicited status must be
enabled with the USTATUS command.
User Default
A user default is a default value that is selectable by
way of the operator control panel or the PJL DEFAULT
command.