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as microphonic cable. They are some types of optic fibre: for distance as 100 to 150 m the industry uses cable with one plastic fibre. For big perimeters, cables are usually composed of 6 to 8 glass fibres. They reach a distance from 100 meter to more than 20 kilometer with one power LED. Those cables are mostly armed with a cover of steel wires and a polyurethane jacket. The power led injects into one of the fibres rays of differents frequencies. The light in a fiber optic cable travels by constantly bouncing from the cladding (mirror-lined wall). Because the cladding does not absorb any light from the core, the light can travel very long distances. When the fibre bends (due to vibrations) the frequencies change. The analyser (in little systems: the sole fibre returns to the anlyser - in big installations: the mirrored light returns in one of the other fibers) sees those changes and after comparison with models can give precise alarmsignals. But modern anlysers applie on the received variables also the so called
Fourier Transform: with those caculations - made possible by current fast processors - the analysers give the location of disturbance with a great precision (e.g. 0,5% of the cable lenght).
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and heat detectors connected to the intrusion panel? How does this get reported? If there's an attended security desk and the alarm says "Smoke in
Conference Hall", then the security guys will call the fire department; but a building with an attended security desk is probably big enough to require a separate fire system anyway. As for CO, wouldn't you want the fire department to respond instead of the fuzz? They'd be equipped for it, whereas a police officer won't have a respirator and will have to call the fire department anyway once he's on-site and recognizes the source of the alarm. I suppose if you have, say, ammonia refrigeration (curling rink) or chlorine (water treatment) on site, you could hook up those detectors to the intrusion panel as well; but then you'd need a fairly complex panel to decide who to call for what sorts of alarms. --
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blocks the beam would cause that the barrier will not working at all or will generate nuisance (not false!) alarms (Nuisance Alarms NA is not the same as False Alarms FA. FA is due to a technical fault). A barrier with a reach of 100 to 200 m, needs a corridor with a width of approx. 5 to 7 m and a flat ground surface.
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They are different types of systems. Simple systems functions on the principle of transmission of light: cutting the cable gives an alarm. It's utilised for the detection of picking objects (e.g. solar panels). But the real thing don't work on the basis of loss of light and is absolutely not the same
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required for the building to meet any code, often also include some fire protection capability. It's not separated, it may not meet local regs to be recognised as a "fire alarm" (where such an installation is mandatory). However it does put fire alarms into houses that don't otherwise have one, so it
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It is not true that microwave barriers are extremely sensitive to weather as rain, snow and fog. Since a microwave barrier works with electromagnetical energy (like cellular mobiles) he don't stop working. A major "con" is the need of a "sterile" perimeter line because trees, bushes or anything that
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Do you have a pointer to such a system? Would this be something like the "Radio Shack" or "do it yourself", home-center type of installation? In this part of the world new homes must have smoke and CO detectors, but they are free-standing and don't have a central panel or off-site alert capability.
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I'd like to find out more about this. In my limited exposure to fire alarm installations, the fire alarm was required to be strictly separate from the intrusion detection and access control systems (right down to not sharing the same conduits for wiring). What sort of installation would use smoke
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With the upswing of burglaries pepper spray accessories have come on the market, they are attached to the alarm system and literally bomb or fog specific rooms in a home or business. Would this be a useful update to this entry on
Security alarm systems?
603:(lower case A), currently a disambiguation page. However I can see there was an article there previously and it seems to have been removed without any explanation, so I might revert back to that. I also noticed there was apparently an article at
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The
Section on Broadband is definitely outdated. There are new products out now that use Internet plus GPRS Mobile Broadband with fall back to PSTN. These systems out perform all current standards. see
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699:, one of the most common domestic burglar alarm panels in the UK. The sort of thing a jobbing electrician or alarm installer fits when you phone up and ask for a burglar alarm.
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There are a bunch of sections describing various types of alarm sensors that end with a conclusion section. This is blatant original research, and should be removed as per
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527:"Burglar (or intrusion), fire, and safety alarms are all electronic today." The opening sounds like something from uncyclopedia. This whole article should be updated.
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585:, as they are commonly used to alert of a robbery, rather than a burglary. I guess I'll have to go elsewhere to learn about those things, though. How odd.
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No, this is not a "fire alarm", as required to satisfy the code for fire alarms in the cases when fire alarms are required on buildings. It is instead a
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You're talking about the sort of panel where it's required by code to have a fire alarm: apartment buildings, offices, large houses split into flats.
368:"Home Security" links here. It needs it's own article though. Home Security and Burglar Alarms are not similar enough to have an ambiguation link.
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Could you site some specific examples? I believe I can fix them (without deletion) if I knew what the specific contended sections are.
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Professionally installed, a long step up from the do-it-youself level, but not necessarily the systems for a school or hotel. I see
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The sources quoted and the information contained in this article are far outdated and should be updated immediately.
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Zones 7 and 8 may be programmed as a 24 Hour Fire Zone operating all of the time except during engineer mode.
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We don't have an article on silent alarms? That's what I came here looking for. I definitely don't get why
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The citations for this article are not consistently formatted; I'm now in the process of sorting them out.
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on
Knowledge (XXG). If you would like to participate, please visit the project page, where you can join
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You could save us both a lot of time by reading the same statement a dozen lines back up the page.
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This article was the subject of a Wiki
Education Foundation-supported course assignment, between
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This article was the subject of a Wiki
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Seems to be some text at the top of the page that does not belong, something about a centipede
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offers CO monitoring, too. (Ironically their local office is downstairs from me.) --
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There is also a simpler situation, where a single house (where few countries
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a fire alarm) has a burglar alarm panel installed. This simple panel,
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BurglarBomb Pepper Spray Home and
Business Security Systems.
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not sure if intentional; dunno how to remove it either
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Your scholarship is exceeded only by your gentility. --
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alarm. Burglar alarms are the subject of this article.
371:"Security Systems" should have it's own article too.
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Wiki
Education Foundation-supported course assignment
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Wiki
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763:"not necessarily the systems for a school or hotel."
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397:Sources are outdated. This article needs updating.
414:Bulldog Security Services : Atlanta Home Security
832:Pepper Spray Home and Business Security Systems
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420:Then what is it? -
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529:—Preceding
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318:21 May 2021
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105:. Please
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