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Invisible Fence Inc. (commonly referred to as Invisible Fence Brand) is a company that designs radio pet fences for cats and dogs. Manufactured and distributed by Radio System Corporation, the company sells wireless and fenceless systems that were first introduced in 1973. [ 1 ]
A pet fence or radio fence, is an electronic system designed to keep a pet or other domestic animal within a set of predefined boundaries without the use of a physical barrier. A mild electric shock is delivered by an electronic collar if its warning sound is ignored. The system was first invented and patented by Richard Peck in 1973. [1]
Buried electric fences (also called "invisible fences" or "electronic fences") are sometimes used to contain dogs or livestock. The buried wire radiates a weak radio signal, which is detected by a collar worn by the animal. The collar emits a warning noise near the wire, but if this is ignored, produces a mild shock.
A wireless system can be moved to a new property easily. An important wireless connection for security is between the control panel and the monitoring station. Wireless monitoring of the alarm system protects against a burglar cutting cables or from failures of an internet provider. This setup is commonly referred to as fully wireless.
AN/AAA - Airborne Infrared Auxiliary Systems Designation Purpose/Description Location/Used By Manufacturer AN/AAA-3: Receiver Group, paired with AN/AAS-15: F-8 Crusader: AN/AAA-4: Infrared search and track (IRST) system: F-4 Phantom II [1] [2] American Car and Foundry Company, [3] Texas Instruments (now Raytheon)
IR sites are generally used for a small geographic area or to fill in holes. For sites that are used to fill in coverage traffic is very limited. To allow as limited a number of channels for use, and to be spectrum efficient, Voice On Control (VOC) was developed to permit the control channel to temporarily act as a voice channel. [ 1 ]
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