Method of and apparatus for establishing emergency communications in a two-way cable television system
First Claim
1. A method of establishing emergency communications between a master station and a remote station in a two-way cable television system, which comprises the steps of:
- activating an annunciator means at the remote station upon application of a first signal;
connecting power to a television receiver at the remote station upon application of a second signal;
tuning the remote station to a predetermined channel upon application of a third signal;
establishing the first, second and third signals in response to a fourth signal;
conditioning the generation of the fourth signal in response to a coded function signal from the master station; and
generating the fourth signal in response to a coded command signal from the master station.
3 Assignments
0 Petitions
Accused Products
Abstract
In a two-way cable television communications system wherein a central or master station is coupled to a plurality of remote stations through a coaxial cable network, each remote unit is provided with means for decoding an emergency alert transmission signal from the master station to generate an internal signal to sound an annunciator, alerting a subscriber or viewer at the remote station that an emergency communication is forthcoming, switching on a television receiver at the remote station, if the television receiver is not on, and tuning the television receiver through a converter to a predetermined television channel to condition the television receiver to receive emergency communications from the master station.
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Citations
8 Claims
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1. A method of establishing emergency communications between a master station and a remote station in a two-way cable television system, which comprises the steps of:
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activating an annunciator means at the remote station upon application of a first signal; connecting power to a television receiver at the remote station upon application of a second signal; tuning the remote station to a predetermined channel upon application of a third signal; establishing the first, second and third signals in response to a fourth signal; conditioning the generation of the fourth signal in response to a coded function signal from the master station; and generating the fourth signal in response to a coded command signal from the master station. - View Dependent Claims (2)
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3. An apparatus for establishing emergency communications between a master station and a remote station in a two-way cable television system, which comprises:
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annunciator means at the remote station; means for activating said annunciator means upon application of a first signal; means for connecting power to a television receiver at the remote station upon application of a second signal; means for tuning the remote station to a predetermined channel upon application of a third signal; means for establishing said first, second and third signals in response to a fourth signal; means for generating said fourth signal; means responsive to a coded function signal from the master station for conditioning the fourth signal generating means for operation; and means responsive to a coded command signal from the master station for operating the fourth signal generating means. - View Dependent Claims (4, 5, 6, 7, 8)
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Specification