HP PCL/PJL reference - PCL 5 Comparison Guide

ENWW Printer-Specific Differences 2-9
JOB
JOB renames the current job name.
?&b#WJOB<sp>jobname
All characters are valid. For the job name the first 127 characters are
used.
There is no default jobname.
TYPE
TYPE changes the type (device type) portion of the printer’s
AppleTalk Name Binding Protocol type field.
?&b#WTYPE<sp>devicetype
Valid characters for the device type include 0-255 except for
characters $00, “@” ($40), “:” ($3A), “*” ($2A), “=” ($3D), and $C5.
The devicetype must contain at least one character, and only the first
31 characters are used. If an invalid character ($00 is not treated as
an invalid character) is contained in the devicetype, the printer will
ignore the escape sequence. If the printer encounters the NULL ($00)
character in the devicetype, it uses the NULL character to terminate
the device type. All the characters preceding the NULL will be used
as the devicetype. If the device type is invalid then the printer's type is
not changed.
The default device type for PCL is “HP LaserJet 4” and for PostScript
is “LaserWriter”.