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Driver
See printer driver .
DTR/DSR
An acronym for Data Terminal Ready and Data Signal Received, a hard-
ware-controlled protocol. It controls the flow of data via signals on the DTR/
DSR line, as opposed to XON/XOFF protocol, which is software controlled.
Electrophotographic Drum
A drum in the toner cartridge that is sensitive to both light and electricity. It
is used in the creation and transfer of images to the printed page. See also
toner , toner cartridge.
Emulation
Software that allows the printer to respond to commands intended for a
different type of printer. For example, when the printer is set for HP PCL
emulation, it responds to the same commands (HP PCL) that a Hewlett-
Packard LaserJet printer does.
Emulation Card
See font card , and security card .
Emulation Sensing Processor (ESP) Technology
Emulation Sensing Processor technology. Using a form of artificial intelli-
gence, ESP technology analyzes incoming file data from any of your
printer's interfaces, selects the appropriate printer language from those
installed on the printer, and processes the print job. ESP technology works
with most popular commercially available applications.
Energy Star
The US Environmental Protection Agency (EPA) Energy Star Computers
program promotes the use of energy-efficient personal computers, moni-
tors, and printers and the reduction of air pollution caused by power
generation. Equipment designated as being Energy Star compliant have
qualified under the Energy Star regulations.
Ethernet Network
Developed by Xerox, Ethernet is a local area network that uses coaxial
cable (thick or thin), or twisted pair wire to connect nodes transmitting
variable-length frames of data at 10 Mbps (10-million bits per second).
G-4
QMS 1725E Print System Reference
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