High throughput embedded code hopping system with bypass mode

Details High throughput embedded code hopping system with bypass mode High throughput embedded code hopping system with bypass mode

1995-06-02

1998-08-25

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

34082534, 380 23, 380 28, 375369, G06F 704

Patent

active

057987114

ABSTRACT:
A system for monitoring and controlling an area comprising a controller for controlling system operational functions; at least one remote control transmitter for transmitting at least one system command to said controller in a code word having a fixed word and a hopping word therein; the fixed word having an identification code for selective control of the controller, the identification code programmed therein, and a channel code for issuing high and low security commands to the controller; a hopping algorithm for modifying the hopping code of the transmitter n-times in response to n-times activation of said transmitter and for modifying the hopping word m-times within the controller upon receipt of the code word m-times from said transmitter; and, a bypass mode for bypassing the code hopping algorithm and for controlling system functions in response to the controller receiving the low security command.

REFERENCES:
patent: 4847614 (1989-07-01), Keller
patent: 5103221 (1992-04-01), Memmola
patent: 5517187 (1996-05-01), Bruwer et al.

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