Security terminal for use with two-way interactive cable system
First Claim
1. A security terminal for use with a two-way interactive cable system and a switched telephone network;
- said cable system having a central station including means for transmitting address and control signals over a cable to control communications with interactive television terminals on the premises of respective subscribers, and means for receiving response signals over said cable from said television terminals;
said security terminal comprisingmeans for developing an alarm code signal;
control means connected to said cable for recognizing a respective address and in response thereto for transmitting said alarm code signal over said cable to said central station;
said control means being further operative to recognize transmission along said cable from said central station of a confirmation of said alarm code signal; and
telephone dialer means connected to a telephone line in said switched telephone network;
said control means being responsive to a failure to recognize a confirmation of said alarm code signal for causing said telephone dialer means to dial a predetermined telephone number, and for outputting on said telephone line a signal identifying the security terminal and a signal representative of said alarm code signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A security terminal for use with a two-way interactive cable system. The security terminal develops alarm and supervisory signals, and controls their transmission over the cable when polled by a central station. The terminal discriminates between four different types of alarm condition (burglary, fire, medical and general emergency), and transmits respective coded signals over the cable, or over a switched telephone network if cable transmission is not successful. To further insure that alarm signals are properly transmitted in the event of a cable outage, the terminal responds to a cable-sent test command from the central station by causing the dialer to dial the central station over the switched telephone network; in this way, the dialer mechanism can be tested periodically to insure that it will be operative if needed.
192 Citations
86 Claims
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1. A security terminal for use with a two-way interactive cable system and a switched telephone network;
- said cable system having a central station including means for transmitting address and control signals over a cable to control communications with interactive television terminals on the premises of respective subscribers, and means for receiving response signals over said cable from said television terminals;
said security terminal comprisingmeans for developing an alarm code signal; control means connected to said cable for recognizing a respective address and in response thereto for transmitting said alarm code signal over said cable to said central station; said control means being further operative to recognize transmission along said cable from said central station of a confirmation of said alarm code signal; and telephone dialer means connected to a telephone line in said switched telephone network; said control means being responsive to a failure to recognize a confirmation of said alarm code signal for causing said telephone dialer means to dial a predetermined telephone number, and for outputting on said telephone line a signal identifying the security terminal and a signal representative of said alarm code signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
- said cable system having a central station including means for transmitting address and control signals over a cable to control communications with interactive television terminals on the premises of respective subscribers, and means for receiving response signals over said cable from said television terminals;
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30. A security terminal for use with a two-way interactive communications system and a switched telephone network;
- said communications system having station means for transmitting coded signals over a communications link to control communications with interactive television terminals on the premises of respective subscribers, and station means for receiving response signals over said link from said television terminals;
said security terminal comprisingmeans for developing an alarm code signal; control means connected to said communications link for recognizing station-means-transmitted coded signals representative of a respective address and in response thereto for transmitting said alarm code signal over said link to said receiving station means; telephone dialer means connected to a telephone line in said switched telephone network; and means responsive to a failure in the transmission of said alarm code signal over said link for causing said telephone dialer means to dial a predetermined telephone number, and for outputting on said telephone line a signal identifying the security terminal and a signal representative of said alarm code signal; said control means being further operative to recognize a station-means-transmitted dialer test control signal on said link, and in response thereto to cause said telephone dialer means to dial said predetermined telephone number, and to output on said telephone line a signal identifying the security terminal and a signal indicative that a dialer test control signal was received by the terminal. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
- said communications system having station means for transmitting coded signals over a communications link to control communications with interactive television terminals on the premises of respective subscribers, and station means for receiving response signals over said link from said television terminals;
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58. A security terminal for use with a two-way interactive communications system and a switched telephone network;
- said communications system having station means for transmitting coded signals over a communications link to control communications with interactive television terminals on the premises of respective subscribers, and station means for receiving response signals over said communications link from said television terminals;
said security terminal comprisingmeans for developing an alarm code signal; control means connected to said communications link for recognizing station-means-transmitted coded signals representative of a respective address and in response thereto for transmitting said alarm code signal over said link to said receiving station means; telephone dialer means connected to a telephone line in said switched telephone network; and means responsive to a failure in the transmission of said alarm code signal over said link for causing said telephone dialer means to dial a predetermined telephone number, and for outputting on said telephone line a signal identifying the security terminal and a signal representative of said alarm code signal. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
- said communications system having station means for transmitting coded signals over a communications link to control communications with interactive television terminals on the premises of respective subscribers, and station means for receiving response signals over said communications link from said television terminals;
Specification