Bluetooth is a telecommunication industry specification that describes how mobiles phones, computers, and personal digital assistants(PDAs) can be easily interconnected using a short-range wireless connection.
Using this technology, users of cellular phones, pagers, and personal digital assistants can buys a three-in-one phone that can double as a portable phone at home or in the office, get quickly synchronized with information in a desktop or notebook computer, initiate the sending or receiving of a fax, initiate a print-out, and, in general, have all mobile and fixed computer devices be totally coordinated.
Bluetooth requires that a low-cost transceiver chip be included in each device. The transceiver transmits and receivers in a previously unused frequency band of 2.45GHz that is available globally. In addition to data, up to three voice channels are available.
Each device has a unique 48-bit address from the IEEE 802 standard. Connections can be point-to-point or multipoint. The maximum range is 10 meters. Data can be exchanged at a rate of 1 megabit per second(up to 2Mbps in the second generation of the technology).
A frequency hop scheme allows devices to communicate even in areas with a great deal of electromagnetic interference. Built-in encryption and verification is provided.
The technology got its unusual name in honor of Harald Bluetooth, king of Denmark in mid-tenth century.