Intercom/wireless door bell for multi-handset telephone system

Details Intercom/wireless door bell for multi-handset telephone system Intercom/wireless door bell for multi-handset telephone system

2006-05-09

2010-06-15

Nguyen, Duc M (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S567000, C455S550100, C455S462000, C348S156000, C340S539250

Reexamination Certificate

active

07738917

ABSTRACT:
A multi handset telephone system with a wireless telecom/doorbell module. The telecom/doorbell module has similar electronics as a cordless handset that includes audio and RF link with a base unit. A speakerphone functionality of a wireless telecom/doorbell audio processor is used to provide an intercom audio conversation. The wireless intercom/doorbell module is battery powered that is either charged by an AC adapter or by an existing doorbell wiring. The wireless intercom/doorbell module also work in parallel with the existing bell wiring. When a page key is pressed, the module pages the telephone system and shorts the doorbell wiring to make an existing bell ring. The doorbell module is coupled with a camera.

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German Office Action with English Translation dated Dec. 3, 2007.

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