BLUETOOTH

  In 1994, the L. M . Ericsson company became interested in connecting its mobile phones to other devices (e.g., PDAs) without cables. Together with four other companies (IBM, Intel,Nokia, and Toshiba) , it formed a Special interest group, to develop a wireless standard for interconnecting computing and communication devices and accessories using short-range , low-power , inexpensive wireless radios . The project was named Bluetooth.
       

           Bluetooth:- Bluetooth is a wireless technology standard for exchanging data over short distances using short - wavelength radio transmissions in the ISM band from 2400-2480 MHz from fixed and mobile devices, creating personal area networks with high levels of security . It can connect several devices, overcoming problems of synchronization.

                     Bluetooth operates in the range of 2400-2483.5 MHz (including guard bands). This is in the globally unlicensed industrial , scientific and medical (ISM) 2.4 GHz short-range radio frequency band.

                      It was named for HaraldBlaatand , the king of Denmark (940-981), a viking king who unified (i.e., conquered) Denmark and Norway Blaatand translates to Bluetooth , also without cables.

                      Bluetooth is a wireless LAN technology designed to connect devices of different functions such as telephones , notebooks, computer (desktop and laptop), cameras , printers and so on.

                           Bluetooth technology has several applications. Peripheral devices such as wire less mouse or keyboard can communicate with the computer through this technology.

                        Today , Bluetooth technology is the implementation of a protocol defined by the IEEE 802.15 standard. The standard defines a wireless personal -area network operable in an area the size of a room or a hall.