Portable telephone system and method of performing communication

Details Portable telephone system and method of performing communication Portable telephone system and method of performing communication

1995-12-14

1999-08-17

Bost, Dwayne D.

Telecommunications

Radiotelephone system

Including public cordless extension system

455461, H04Q 700

Patent

active

059407662

ABSTRACT:
A portable telephone system includes at least one master unit connected to a telephone line, and a plurality of subsidiary units for performing radio communication with the master unit. Each subsidiary unit includes radio section, a calling information memory section, and an originating circuit section. The radio section selectively performs first radio communication with the master unit and second radio communication with a remote subsidiary unit. The calling information memory section prestores a telephone number for the telephone line which is assigned to the remote subsidiary unit in correspondence with the master unit. The originating circuit section calls the remote subsidiary unit by the second radio communication. When connection for the second radio communication cannot be performed with respect to the remote subsidiary unit, the originating circuit section automatically calls the remote subsidiary unit through the telephone line by the first radio communication in accordance with the telephone number of the remote subsidiary unit which is stored in the calling information memory section.

REFERENCES:
patent: 5231635 (1993-07-01), Travers et al.
patent: 5311571 (1994-05-01), Pickert
patent: 5379339 (1995-01-01), Sakamoto
patent: 5524277 (1996-06-01), Yoshioka et al.

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