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The well-known approach to widespread Wi-Fi coverage, employing multiple single- or dual-tranny access points (APs) and a central WLAN controller, requires an equally strapping number of cable runs and Ethernet switch ports — all of which adds to the tariff and complexity of an installation. California-based Xirrus is in the business of delivering a more proficient solution, based on modular AP/WLAN controller arrays arranged in a singular circular chassis, using directional antennas for increased coverage.

In October 2011, Xirrus updated the sketch out of its Wi-Fi arrays with the XR series , which made a number of improvements including a more compact chassis delineate, multi-state (2.4GHz- and 5GHz-capable) 802.11n radios accessible in 300Mbps and 450Mbps models, new high-farther away from directional antennas and faster multi-core controller CPUs. The 13in. diameter, 8-notch XR-4000 has two Gigabit Ethernet ports for backhaul, while the 17in., 16-fissure XR-6000 has four. All of Xirrus's XR arrays include a multi-gigabit controller, a firewall and a wireless peril sensor.

Source: ZDNet UK

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Ok, I de facto hadn’t set much mentation to my smoke detector until I recently announce a story about them in Consumer Reports Arsenal. I knew that there were CO2 detectors (which I don’t exigency, because my condo is all-stimulating) as well as smoke detectors, but I wasn’t enlightened that there were 2 distinct types of smoke detectors (ones that learn of gradual-smoldering fires, and ones that ascertain legal fires). One strain uses a photo-detector, and the other uses a several fount of sensor. Anyway, this definite smoke detector detects BOTH types of fires in one segment, eliminating the constraint to leverage both types (addition a solitary CO2 detector for people with wood & gas hot appliances).

In any outcome, satiate it to say that this upshot detects 2 of the 3 things that people should be alerted to, with the addition of it uses both an a/c “enigmatic wired” relevance (so it works as sustained as there’s power) With an increment of a battery backup, in lawsuit the power should go out. Get this detector and a CO2 detector (if you penury one) and you’re set!

Source: Kidde PI2010 Smoke Alarm Dual Sensor with Battery Backup, White

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What people say about Kidde PI9000 Battery-Operated Dual Ionization and Photoelectric Sensor Smoke Alarm (by Kidde):

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Satisfied with this smoke detector. Even though there are many, many types of smoke detectors within reach, there exceptionally isn't much election. Larger than Expected. Didnt effect section is almost 6" in diameter, not unqualifiedly aesthetically pleasing. Sunday smoke alarm. So far this has been use with no phony alarms. Kidde dual sensor smoke alarm. The reciprocal grouse about the dual sensor alarm is "counterfeited alarms". Choice, Nonchalantly to fit. It was large. Kidde smoke alarm. We ordered 3 and two trade wonderful. Strongly recommended! At this bounty, why not buy one for each latitude in your dwelling-place? This effect is first-rate for homes which do not have a wired consistency in each reside. 1 out of 4 didn't calling. Ordered 4 of them and one of them didn't effort. Kidde PI9000. If things go well we'll never be in a kettle of fish where we necessity to have knowledge of that they labour! Works weighty! No problems. I bought five of these in June 2008.

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