Dual Layer Dvd: Bluetooth Reviews

Sunday, 21 October 2012

Bluetooth Reviews

The name is essentially synonymous with hands-free headsets for cell phones. But this fascinating technology does so much more than just cell phones. There are Bluetooth mouse devices, keyboards and so much more. The Personal Area Network (PAN) transmits using the same radio wave frequency, 2.4 GHz, as wireless networks. However, Bluetooth transmits and receives on more than one radio frequency. Bluetooth devices take advantage of a technique known as frequency hopping where the devices switch among 79 different frequencies more than 1,600 times a second. This technique helps the different devices avoid interference with other devices, such as microwaves and other Wi-Fi transmissions.
The concept of using a PAN for personal devices such as cell phones began to emerge in the early 1990s. Two employees of a Swedish technology company called Ericsson rolled out Bluetooth technology in 1994. Jaap Haartsen and Sven Mattisson were the first to really capitalize on the frequency-hopping technology.