Speakerphone and extension speakerphone for use in personal emergency response system

A personal emergency response system (PERS) includes a base unit (16) and one or more extension units (20). The base unit includes a speaker (64), a microphone (72), a telephone interface circuit (40), a microcontroller (46), and an autodialer (48). Each extension unit includes a speaker (164), a mi...

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Hauptverfasser:	WOODING ANSON WILLIAM, HENDERSON MARTIN E, BRAV ALAN DAVID
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TELEPHONIC COMMUNICATION
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creator	WOODING ANSON WILLIAM HENDERSON MARTIN E BRAV ALAN DAVID
description	A personal emergency response system (PERS) includes a base unit (16) and one or more extension units (20). The base unit includes a speaker (64), a microphone (72), a telephone interface circuit (40), a microcontroller (46), and an autodialer (48). Each extension unit includes a speaker (164), a microphone (172), a telephone interface circuit (140), and a controller (146) without an autodialer. The base unit controller (46) and the extension unit controller (146) are programmed such that in a help mode, the base unit controller and the extension unit controller assume a master/slave relationship.
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subjects	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TELEPHONIC COMMUNICATION
title	Speakerphone and extension speakerphone for use in personal emergency response system
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