Method for detecting the absence of a portable radiotelephone fr

Details Method for detecting the absence of a portable radiotelephone fr Method for detecting the absence of a portable radiotelephone fr

1992-08-13

1994-02-15

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455343, 379 59, 340568, H04B 138

Patent

active

052875539

ABSTRACT:
The process of the present invention alerts a radiotelephone user when the portable is not connected to the power booster/antenna extender system. By checking for a connect signal from the radiotelephone, the system knows the portable is missing and alerts the user, thus enabling the user to install the portable before driving off without it.

REFERENCES:
patent: 4679026 (1987-07-01), Knakowski
patent: 4893348 (1990-01-01), Andoh
patent: 4974251 (1990-11-01), Ohta et al.
patent: 5184971 (1993-02-01), Williams

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