Vertical Communications DSU II Industry Standard Telephone IST, Intercom, Keypad, Line Groups

Industry Standard Telephone User’s Guide

I

Industry Standard Telephone (IST)

Analog telephone with on a basic 12 button keypad and no advanced features. Some instruments may also include TAP buttons and/or message lamps.

Intercom

An internal communication system that allows you to dial another station at your office or location without connecting to the outside telephone system.

K

Keypad

Buttons on the telephone (0-9, #, and *) used for dialing.

L

Last Number Redialing

Automatically dialing the last number dialed.

Line Groups

Programmers assemble and program outside lines into distinct line groups which must be accessed by using specific dialing codes.

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