Method and apparatus for calling a handset unit in radio telepho

Details Method and apparatus for calling a handset unit in radio telepho Method and apparatus for calling a handset unit in radio telepho

1993-03-30

1995-01-03

Kuntz, Curtis

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, 379210, 379211, H04M 1100

Patent

active

053793390

ABSTRACT:
A radio telephone system is comprised of a communication network, a cordless telephone apparatus and a plurality of public radio base stations, both being connected to the communication network, and a handset unit of the cordless telephone apparatus is capable of exchanging messages with the plurality of public radio base stations. The cordless telephone apparatus is provided with a control-data storage unit for storing data of controlling handsets unit belonging to the cordless telephone apparatus. The control-data storage unit stores data each comprising a combination of an extension number and a phone number of a handset unit. The cordless telephone apparatus judges whether a handset unit to be reached is in a service area of the apparatus, when the handset unit is called from another handset unit of the cordless telephone apparatus. When it is determined that the handset unit to be reached is not in the service area, the cordless telephone apparatus makes an outside-line calling based on the phone number stored in the control-data storage to reach the handset unit through the public radio base station.

REFERENCES:
patent: 4759051 (1988-07-01), Han
patent: 4980907 (1990-12-01), Raith et al.
patent: 5197092 (1993-03-01), Bamburak
patent: 5251248 (1993-10-01), Tokunaga et al.

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