Emergency roadside telephone system
First Claim
1. An emergency telephone terminal for use in an emergency roadside telephone system to communicate with a central station comprisingtransmitter means and receiver means for communicating with the central station;
- a handset having a receiver and a transmitter and being movable between on-hook and off-hook positions;
first circuit means for connecting said handset transmitter with said transmitter means and said handset receiver with said receiver means when said handset is in said off-hook position;
a plurality of emergency switches symbolically marked with pictorial symbols to correspond to various emergency conditions and adapted to be manually actuated; and
second circuit means responsive to said handset being in said off-hook position for coupling said emergency switches with said transmitter means whereby said emergency telephone terminal permits voice and emergency switch communications with said central station.
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Accused Products
Abstract
An emergency roadside telephone system includes a plurality of self-powered, emergency telephone terminals positioned at remote locations, such as along roadways, to permit communication with a central station in order to obtain emergency assistance. Each emergency telephone terminal has a transmitter and a receiver for communication with the central station, a handset for providing voice communication and a plurality of emergency switches carrying symbols representative of various types of emergency assistance required such that a caller can request emergency assistance either by voice communication with an operator at the central station or, if there is a language barrier, by actuating the emergency switches.
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Citations
8 Claims
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1. An emergency telephone terminal for use in an emergency roadside telephone system to communicate with a central station comprising
transmitter means and receiver means for communicating with the central station; -
a handset having a receiver and a transmitter and being movable between on-hook and off-hook positions; first circuit means for connecting said handset transmitter with said transmitter means and said handset receiver with said receiver means when said handset is in said off-hook position; a plurality of emergency switches symbolically marked with pictorial symbols to correspond to various emergency conditions and adapted to be manually actuated; and second circuit means responsive to said handset being in said off-hook position for coupling said emergency switches with said transmitter means whereby said emergency telephone terminal permits voice and emergency switch communications with said central station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification