By James T Geier
Jim Geier examines and assesses lately followed rising instant LAN and PAN technologies/standards, together with IEEE 802 and Bluetooth. genuine international adventure is on the market via case stories and implementation tips through the text.
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Sample text
The FCC allows a user to operate a wireless product without obtaining an FCC license if the product meets certain requirements, such as operating under 1 watt of transmitter output power. This deregulation of the frequency spectrum eliminates the need for user organizations to perform costly and time-consuming frequency planning to coordinate radio installations that will avoid interference with existing radio systems. This is even more advantageous if you plan to move your equipment frequently, because you can avoid the paperwork involved in licensing the product again at the new location.
11 Working Group developed the Wireless LAN Medium Access Control and Physical Layer specifications. Before the ratification of the standard, companies began shipping proprietary wireless LAN radio cards and access points operating in the 902MHz ISM band. These products were initially relatively expensive, at US$1,400 per radio card. As a result, wireless LANs at that time were feasible only for satisfying network requirements when mobility provided tremendous gains in efficiency and resulting cost savings.
Direct sequence, having higher potential data rates, would be best for bandwidth-intensive applications. 04 0584 CH02 6/12/01 9:55 AM Page 41 Wireless Network Configurations CHAPTER 2 41 ISM Radio Frequency Bands In 1985, in an attempt to stimulate the production and use of wireless network products, the FCC modified Part 15 of the radio spectrum regulation, which governs unlicensed devices. The modification authorized wireless network products to operate in the industrial, scientific, and medical (ISM) bands.