Specifications

GLOSSARY
184 VX 520 REFERENCE GUIDE
Telephone line The standard telephone wiring
connecting your phone or terminal to a local or
private telephone company.
Terminal Any device capable of sending and
receiving data over a data link, such as a telephone
line or a RS-232 cable. Some terminals, such as the
VX 520, can print receipts and display information
and graphics on a screen.
Terminal ID An alphanumeric code that identifies a
terminal to a download computer. In this way, the
download computer can determine what data or
application programs to download to that terminal.
For ZonTalk 2000 downloads, the VX 520 terminal
ID is stored in the *ZT record in the CONFIG.SYS file.
This variable should not exceed 10 characters in
length. Not the same as PTID
Terminal-to-terminal application upload The
process of copying the application memory contents
of one terminal to the application memory of another
terminal. A terminal-to-terminal application upload
requires that the terminals be connected to each
other by a serial cable. See also Back-to-back
application download.
Tone dialing Also called touch-tone dialing. A
method of telephone dialing that uses different
pitched tones to specify a phone number. See also
DTMF.
Track 1, 2, or 3 data Information stored on tracks
1, 2, or 3 of a debit or credit card magnetic stripe,
which can be read by a magnetic card reader device,
such as the one that is integrated in the VX 520
terminal.
Transaction An exchange of data resulting in a
transfer of goods, services, value, and/or information
between two parties.
Variable A string of characters that denotes some
value stored within the computer and that can be
changed during execution. A variable may be
internal to a program, in which case it is held in
memory, or external if the program must perform an
input operation to read its value. See Parameter.
Volatile memory A type of memory where the
contents are destroyed if the power supply to the
memory is interrupted. When volatile memory, such
as SRAM, is used for crucial applications, it is often
back up by battery-supplied power. Compare with
Non-volatile memory.