Wi-Fi Handbook: Building 802.11b Wireless Networks
The best guide to designing and building Wi-Fi.
TABLE OF CONTENTS Wi-Fi Handbook: Building 802.11b Wireless Networks
Operation
Once the network is installed and operating, the network operator has to "Keep 'em flying." This will include dealing with day-to-day challenges, the greatest of which is dealing with dynamic interference issues.
How to Deal with Interference Issues
According to the FCC, all Part 15 users must accept interference as part of doing business over public airwaves, but that does not mean we must accept harmful interference, which is an obstruction of such magnitude that signals carrying other telecommunication services are disrupted. What this means is that normal interference is inevitable; thus, it must be calculated as part of the plan and dealt with as issues come up. Simply cranking up the power causes harmful interference, so other peaceful ways of managing the interference must be found.
A variety of sources cause interference on the 2.4 GHz and 5 GHz bands; some of which are 2.4 GHz cordless phones, Bluetooth-enabled devices, microwave ovens, RF lighting, and other WLANs. Currently, the 5 GHz band is relatively free of interference, but as time goes on, this band too will be crowded.
2.4 GHz cordless phones marginally interfere with 802.11b. If it's necessary to buy cordless phones after an 802.11b system is installed, use a 900 MHz model instead.
Bluetooth enables users to link devices wirelessly. Interference from Bluetooth is limited to a short distance due to its limited range. Since Bluetooth devices are used all over the place, they really cannot be anticipated in a design or plan.
Microwave ovens that...
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