VeriFone Omni 3200 Reference Manual page 176

Omni 3200 Reference Manual
C-6
Display. The small screen on the Omni 3200 terminal. Besides
showing fully-formed numerals, letters, punctuation symbols, and
graphics, the display also shows information entered from the core
keypad, as well as system prompts and messages.
Download. To send programs or data from a central or controlling
computer to a remote terminal.
DTMF. Dual-Tone Multi-Frequency. The ordinary dial tone on a
telephone line.
EM Code. Encoding Machine code. In a terminal debugging
procedure, an internal binary code which represents the application
program being interpreted by the terminal's operating system.
Debugger commands executed on a host computer can, for example,
request that the EM code currently being executed on the terminal be
sent back to the host.
ENQ. Abbreviation for 'end-of-inquiry'. A transmission control
character used as a request from a remote station. An ENQ is
commonly used to initiate a data transfer.
EOT. Abbreviation for 'end-of-transmission'. A character sequence
on a data link indicating that the current transmitter has nothing
further to send.
EPROM. Acronym for 'Erasable Programmable Read-Only
Memory'. A type of memory chip that can be re-programmed a
number of times by the user. The EPROM usually contains
permanently stored information, such as the operating system, a
bootloader program, and system prompts. The Omni 3200 flash
EPROM can be overwritten and, unlike an ordinary EPROM, does
not need to be removed from the terminal to be erased.