Glossary

ISDN

ISDN 7500B Data Module

(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.

Data communications device that allows connection 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

Key mode

Kilobits per second.

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

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AT&T 3.0 manual Isdn 7500B Data Module, Jack, Kbps Key mode