Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1992-06-02
1994-11-15
Chin, Stephen
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379369, 379370, 379433, H04M 1100, H04M 100, H04M 900
Patent
active
053655702
ABSTRACT:
Emergency radio telephone apparatus includes a housing, a radio transceiver for receiving and transmitting modulated radio signals, an actuator connected to the housing for actuating the transceiver and initiating the process of making connection to a predetermined emergency phone number. The actuator may alternately be of modular construct, not permanently connected to the housing allowing easy replacement of the emergency call actuator with a modular construction telephone keypad and display, thereby converting the emergency-only radio telephone into a full-functioned radio telephone. A cover can be attached to the transceiver allowing access only to the emergency call actuator thereby restricting calls to only the emergency number. Cover, modular keypad, modular actuator, or transceiver can have a lock to prevent removal of modular components.
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Chin Stephen
Shankar Vijay
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