QMS 2060 Reference page 124

HP-GL emulation, HP-PCL emulation, or another optional emulation)
from those installed on the printer.
The print job is processed without your having to change printer
switch settings or send software commands to accommodate different
printer emulations.
When your printer is in ESP mode, you can easily print files prepared
for a PostScript printer, an HP LaserJet, or an HP-GL plotter. The file
prints correctly as long as it contains the traditional PostScript, HP
PCL, or HP-GL commands for such items as page formats and job
parameters (number of copies, page margins, fonts).
The QMS 2060 Print System prints almost any file sent in a language
ESP technology understands, whether you have one, two, or more
hosts, and whether you are communicating through a parallel, Ether-
net, or other optional interface. Most users never have to change from
ESP mode to another mode.
You can either allow your printer to operate in its default ESP mode or
configure its ports to accept jobs in only a particular emulation mode
(for example, PostScript emulation only, HP PCL only, or HP-GL emu-
lation only). The default printer communication settings can be
changed through the Configuration menu, which you access through
the control panel—in the Administration/Communications menu, you
can choose a default emulation for the parallel and optional serial
interfaces, and in the Administration/Emulations menu, you can con-
figure the printer defaults for each emulation mode. (The optional
LocalTalk interface uses only PostScript.)
Advanced users can also use PostScript operators to reconfigure
printer ports. Generally, it is best to keep your printer in ESP mode.
Since ESP mode is the factory default, all you have to do to use it ini-
tially is connect your host and printer and then send a file.