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Glossary
ISDN
(Integrated Services Digital Network) Public or private
network that provides end-to-end digital connectivity for all
services to which users have access by a limited set of
standard multipurpose user and network interfaces;
provides digital circuit-switched or packet-switched
connections within the network and to other networks for
national and international digital connectivity.
ISDN 7500B Data
Data communications device that allows connection
Module
between an RS-232 DTE device and the control unit via
MLX extension jacks on the 008 MLX or 408 GS/LS-MLX
module.
J
jack
Physical connection point to the system for a telephone,
trunk, or other device. Also called “port.”
K
kbps
Kilobits per second.
Key mode
One of three modes of system operation, in which the
system uses personal lines on line buttons for outside
calls, with a separate interface
(lCOM
buttons) for internal
calling, See also Behind Switch mode and Hybrid/PBX
mode.
Maintenance and Troubleshooting GL–19