The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2015
Filed:
Jul. 17, 2009
Harvey Alexander Elliot, Ojai, CA (US);
Bryan Field-elliot, Ojai, CA (US);
Daniel J. Elliot, Ojai, CA (US);
Harvey Alexander Elliot, Ojai, CA (US);
Bryan Field-Elliot, Ojai, CA (US);
Daniel J. Elliot, Ojai, CA (US);
NUMEREX CORP., Atlanta, GA (US);
Abstract
The present invention allows an alarm monitoring to use satellite broadband services as a data link for communication between an alarms system and a monitoring station, middleware provider, individual user, or other alarm monitor. Standard alarm system protocols are modified to make the communication protocol compatible with the features of satellite broadband. These modifications compensate for the time delay in data transmission inherent in satellite communications, as well as other limitations of satellite communications. In particular, the 'handshake' tone, instead of '1400 hz for 100 ms, silence for 100 ms, 2300 hz for 100 ms', is changed to “DTMF 'A' for at least 100 milliseconds”. In a preferred embodiment the receiver transmits the DTMF A tone for 250 milliseconds. In addition, the delay for “wait for the Acknowledge tone” is extended from 1.25 seconds, to 5 seconds. The “acknowledge” tone, instead of “1400 hz for 400 ms”, is changed to “DTMF 'D' for at least 100 milliseconds”. In a preferred embodiment, the receiver transmits the DTMF D tone for 250 milliseconds.