Security and alarm system

Details Security and alarm system Security and alarm system

1985-07-18

1988-02-09

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340501, 340531, 340534, 340345, 340349, 375 22, 329104, 329106, 328111, 307234, G08B 1300, H04Q 700, H03K 908

Patent

active

047244259

ABSTRACT:
A method and apparatus are provided for transmitting 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 characters arranged in a predetermined sequence. Each character 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 predetermined binary number different from the start byte.

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