Importance

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Abstract

Apparatus for automatically controlling the application of the power ring signal of an incoming call generated by the telephone company to a telecommunication device by way of an electronic switching device connected in series with the telephone line. The electronic switching device is controlled by logic circuitry operating in conjunction with circuitry designed to receive and demodulate the caller identification data signal provided by the telephone company during the silent interval between the first and second power ring signals of an incoming call. The logic circuitry maintains the electronic switching device in a nonconductive state, while the telephone company caller identification data received is used to determine whether to continue to suppress the subsequent power ring signals, or allow them to pass to the connected telecommunication device by actuating the electronic switching device to the conducting state. Additionally, provision to interface the logic circuitry to the expansion bus of a computer, thereby applying the greater data processing flexibility of the computer to the processing of the caller identification data and the control of the power ring signal, is taught.

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First Claim