Security and alarm system

Details Security and alarm system Security and alarm system

G - Physics

08

B

328/165, 325/3,

G08B 1/00 (2006.01) G08B 13/00 (2006.01) G08B 19/00 (2006.01) G08B 25/10 (2006.01)

Patent

CA 1270041

SECURITY AND ALARM SYSTEM ABSTRACT OF THE DISCLOSURE A method and apparatus are provided for transmit- ting from a radio transmitter which is part of a first system to a radio receiver which is part of a second system a message which includes a plurality of charac- ters arranged in a predetermined sequence. Each charac- ter of the message is transmitted in the form of a 48-bit binary word, the first byte of the word being a start byte, the second and third bytes being identical binary numbers representing the position in the message of a selected one of the characters, the fourth and fifth bytes being identical binary numbers which are the ASCII code corresponding to the selected character, and the sixth byte being a stop byte which is a predeter- mined binary number different from the start byte.

512787

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