Speakerphone and extension speakerphone for use in personal emergency response system

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
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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Beschreibung
Zusammenfassung: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.