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Default
The value or setting built in to a system or program. Default settings can
usually be changed. See also
factory default.
Download
Transfer information from one device to another. See also
soft fonts
.
dpi
Dots Per Inch, a measurement unit used to indicate printer resolution.
Driver
See
printer driver.
Drum
The rotating cylinder in a laser printer which transfers the image to the page
as it passes through the printer.
DTR/DSR
Data Terminal Ready/Data Set Ready. DTR/DSR is a hardware-controlled
protocol. It controls the flow of data via signals on the DTR line, as opposed
to XON/XOFF protocol, which is software controlled.
Emulation
The ability of the printer to respond correctly to commands that are intended
for a different type of printer. For example, when the printer is set for HP
PCL emulation, it responds to the same commands (PCL) that Hewlett-
Packard LaserJet printers do.
ESP
Emulation Sensing Processor. ESP technology uses a form of artificial
intelligence to analyze incoming file data from any of the printer’s interfaces.
ESP technology, which works with most popular commercially available
applications, selects the appropriate printer language from those installed
on the printer and processes the print job, freeing the user from the need
to change printer switch settings or send software commands to
accommodate different printer languages.
Ethernet Network
A linear local area network developed by Xerox, Digital Equipment Corp.,
and Intel in 1976 and now an industry standard.