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  2. ADT Inc. - Wikipedia

    en.wikipedia.org/wiki/ADT_Inc.

    ADT Inc., formerly The ADT Corporation, is an American security company that provides residential and small business electronic security, fire protection, and other related alarm monitoring services throughout the United States. The corporate head office is located in Boca Raton, Florida. [5]

  3. Quindar tones - Wikipedia

    en.wikipedia.org/wiki/Quindar_tones

    Therefore, those transmissions would consist of a "beep" (PTT press) followed by Houston talking, then another "beep" (PTT release) and finally the voice of the astronauts. Another misconception about Quindar tones is that they were designed to signal the end of a transmission, similar to a courtesy tone used on many half-duplex radio repeaters .

  4. Tyco Integrated Security - Wikipedia

    en.wikipedia.org/wiki/Tyco_Integrated_Security

    Tyco Integrated Security is a business unit of Tyco International.It is a company specializing in electronic security products, installation and services. The company's principal place of business in the U.S. is Boca Raton, Florida; and Mississauga, Ontario in Canada with over 10,000 employees and nearly 200 offices throughout North America.

  5. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    Long continuous beep tone Memory failure Steady, long beeps Power supply bad No beep Power supply bad, system not plugged in, or power not turned on No beep If everything seems to be functioning correctly there may be a problem with the 'beeper' itself. The system will normally beep one short beep. One long, two short beeps Video card failure

  6. Monitronics - Wikipedia

    en.wikipedia.org/wiki/Monitronics

    As of 2015, it was the second largest security alarm monitoring company in the United States, behind ADT. [ 5 ] In 2013, MONI purchased Security Networks, a network of about 225 security dealers, for $507 million to diversify its service offerings and enter into the developing and complementary DIY home service category.

  7. MDC-1200 - Wikipedia

    en.wikipedia.org/wiki/MDC-1200

    MDC (Motorola Data Communications), also known as Stat-Alert, MDC-1200 and MDC-600, is a Motorola two-way radio low-speed data system using audio frequency shift keying, (AFSK). MDC-600 uses a 600 baud data rate. MDC-1200 uses a 1,200 baud data rate. Systems employ either one of the two baud rates. Mark and space tones are 1,200 Hz and 1,800 Hz ...

  8. Back-up beeper - Wikipedia

    en.wikipedia.org/wiki/Back-up_beeper

    Back-up beepers or an observer are required by OSHA for earth-moving vehicles with an obstructed view to the rear and no one on the ground to help guide the driver. [9] OSHA regulation 29 CFR Part 1926.601(b)(4) requires "a reverse signal alarm audible above surrounding noise level", but only when the motor vehicle has "an obstructed view to the rear".

  9. Anomaly-based intrusion detection system - Wikipedia

    en.wikipedia.org/wiki/Anomaly-based_intrusion...

    In order to positively identify attack traffic, the system must be taught to recognize normal system activity. The two phases of a majority of anomaly detection systems consist of the training phase (where a profile of normal behaviors is built) and testing phase (where current traffic is compared with the profile created in the training phase ...