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2. Standards for Alarm Systems, Installation, and Monitoring

   en.wikipedia.org/wiki/Standards_for_Alarm...

   The alarm transmission methods covered under UL 365 can be categorized under standard line security or encrypted line security. The systems are required to operate within the limits of Class 2 remote control and signal circuits as defined by the National Electrical Code, NFPA 70. [15]

3. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   Authorization may be indicated in any number of ways, often with keys or codes used at the control panel or a remote panel near an entry. High-security alarms may require multiple codes, or a fingerprint, badge, hand-geometry, retinal scan, encrypted-response generator, and other means that are deemed sufficiently secure for the purpose.

4. Vivint - Wikipedia

   en.wikipedia.org/wiki/Vivint

   In 1999, Keith Nellesen and Todd Pedersen co-founded APX Alarm Security Solutions in Provo, Utah. [4] [5] At the time, the company sold and installed security systems. [4] APX Alarm Security Solutions rebranded as Vivint in February 2011. [4] [6] Vivint was acquired by The Blackstone Group in November 2012. [7]

5. UL (safety organization) - Wikipedia

   en.wikipedia.org/wiki/UL_(safety_organization)

   UL 636, Standard for Holdup Alarm Units and Systems (DOD Approved: July 30, 1987, ANSI Approved: January 30, 2018) [30] UL 639, Standard for Intrusion-Detection Units (ANSI Approved: October 24, 2019) [31] UL 681, Installation and Classification of Burglar and Holdup Alarm Systems (DOD Approved: January 02, 1992, ANSI Approved: December 17 ...

6. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   Glass break detectors are usually installed near glass doors or a window front of a store. This equipment uses a microphone to detect when a pane of glass is broken or shattered. By monitoring the sound and vibrations the alarm only reacts to sounds above a certain threshold to avoid false alarms. [5]

7. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!