Importance

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Abstract

A key telephone system which is operably responsive to digitally encoded service orders and instructions stored in a ROM of a switching facility in a local ISDN telephone exchange achieves enhanced connectivity by using a dedicated line that provides a digital signaling and supervision communications path which is exclusively an ISDN basic rate 0B+D teleservice channel. A key switch unit of the system is connected to the exchange by POTS lines to provide conventional voice analog services to a plurality of its subscriber stations. Interfacing the key switch unit with the teleservice channel, a personal computer translates data downloaded from the switching facility into instructions recognized by the unit and enables individual subscriber stations with enhanced service connectivity features while displaying such features on a display unit of each station.

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First Claim