Radio telephone apparatus having call limiting function

Details Radio telephone apparatus having call limiting function Radio telephone apparatus having call limiting function

1994-09-16

1995-08-01

Kuntz, Curtis

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379111, 379131, 379192, H04M 1100, H04M 300, H04M 1500

Patent

active

054386128

ABSTRACT:
A radio telephone apparatus having a time specifying unit, a time measuring unit, a call controller, and an auxiliary power supply. The time measuring unit measures an elapsed period of time to detect the lapse of a specified period of time previously inputted to the time specifying unit. When it is found, as a result of the measurement, that the specified period of time has elapsed, the call controller limits call origination. Also, when the main power supply is off, the time specifying unit and the time measuring unit are powered from the auxiliary power supply, thereby measuring the lapse of time regardless of the on or off state of the main power supply. Consequently, call origination can be limited according to the lapse of a specified period of time or the arrival of a specified point in time.

REFERENCES:
patent: 4794642 (1988-12-01), Arbabzadah et al.
patent: 4924499 (1990-05-01), Serby
patent: 4951308 (1990-08-01), Bishop et al.
patent: 5212810 (1993-05-01), Maeda et al.

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