Method for controlling an accessory of a subscriber terminal equ

Details Method for controlling an accessory of a subscriber terminal equ Method for controlling an accessory of a subscriber terminal equ

1996-11-12

1998-08-25

Vo, Nguyen

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455557, 455575, H04B 138, H04M 100

Patent

active

057992550

ABSTRACT:
The present invention relates to a method for controlling an accessory of a location data maintaining subscriber terminal equipment (204) of a cellular network and an accessory (214), and which comprises memory (202, 210) for maintaining a specified subscriber identifier differing from the identifier of the subscriber terminal equipment, and circuitry (206) for connecting to the terminal equipment. In order to enable reliable checking of location data, the combination of the terminal equipment and the accessory comprises processor circuitry (200, 204, 210) for determining its location in connection with activation, memory (210) for storing location parameters, processor with memory circuit (200, 210) for checking its location whenever a call is established when the terminal equipment is connected to the accessory, wherein the processor compares the checked location with the stored location data, and obstructs the use of the subscriber identifier during the call in case the location data differ from one another more than the preset threshold value.

REFERENCES:
patent: 4989230 (1991-01-01), Gillig et al.
patent: 5128925 (1992-07-01), Dornstetter et al.
patent: 5260988 (1993-11-01), Schellinger et al.
patent: 5404580 (1995-04-01), Simpson et al.

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