Symbol Technologies VRC 6940 - Manual (Page 107)

Glossary-4
VRC 6940 Product Reference Guide
I/O Ports
Input/Output Ports. The I/O ports are primarily dedicated to passing information into or out
of the terminal’s memory. The VRC 6940 terminal includes a Serial port and a Scanner port.
IP Address
A 32-bit address assigned to nodes on a TCP/IP network. The address is written as four octets
separated by periods (dotted decimal format), e.g., 130.24.34.03. They represent a network
section, an optional subnet section, and a host section. Also see Terminal IP Address.
LAN
Local Area Network.
Liquid Crystal Display (LCD)
A display that uses liquid crystal sealed between two glass plates. The crystals are excited by
precise electrical charges, causing them to reflect light outside according to their bias. They
use little electricity and react relatively quickly. They require external light to reflect their
information to the user.
Light Emitting Diode (LED)
A low power electronic light source commonly used as an indicator light. It uses less power
than an incandescent light bulb but more than a Liquid Crystal Display (LCD).
MU
Mobile Unit.
Net ID
A Net ID allows facilities using Spring protocol to limit which Access Points a VRC 6940
terminal can communicate with. The terminal can only communicate with Spectrum24
Access Points that have matching Net IDs. See the Spectrum24 documentation for more
information.
NVM
Non-volatile memory. This is memory that retains its contents after its power supply is
removed or turned off. Files and programs contained in NVM help load programs onto the
terminal and provide an environment for running programs.
Null Modem
A special cable that allows direct connection between two DTE (Data Terminal Equipment)
devices by making each one emulate a DCE (Data Communications Equipment) device.