Bluetooth exchanges information between devices through a globally unlicensed Industrial, Scientific, Medical (ISM) radio bands. It uses 2.4 GHz short range frequency of ISM. Bluetooth Special Interest Group(SIG) develop and license Bluetooth specifications. The SIG comprises of telecommunication, networking, computing and electronic companies (Newton, Harold).
Bluetooth can transmit data between devices such as laptops, telephones, printers, digital cameras, mobile phones and video game consoles. It is a wireless protocol made for low power consumption and has short range which is based on low cost transceiver microchips in each device (Bluetooth SIG). The short ranges of Bluetooth are 1 meter, 10 meters and 100 meters and these ranges are power and class dependent. Class 1 of Bluetooth has a maximum permitted power of 100mW and approximate range of 100m; class 2 has a maximum permitted power of 2.5mW and approximate range of 10m; class 3 has a maximum permitted power of 1mW and approximate range of 1m (Newton, Harold). Bluetooth allows communication to be done among devices when they are in range. Because this system of communication uses radio waves, devices do not need to be in line of sight of each other for communication to take place. (Newton, Harold).
In order for a device to be used by Bluetooth, it must be compatible with Bluetooth profiles. The most common use of Bluetooth includes wireless communication between handsets and mobile phones, wireless communication between computer input and output devices, file transfer between devices and OBEX, internet access of personal computers and communications in medical equipment. The technology of Bluetooth exists in many devices like Wi-Fi, telephones, and play stations and also in some high definition headsets and watches. This technology simplifies set up of services between devices. Devices with this technology can advertise all their services. It allows much of the security and permission configuration to be automated making its services easier for use as compared to other network types.
A personal computer is required to have Bluetooth adapter in order to develop communication with other Bluetooth devices like mobile phones, keyboards and mice. Some laptops and personal computers have in built adapters while in others an external adapter is required. Through Bluetooth, multiple devices can communicate with a computer over one adapter. A Bluetooth enabled mobile phone allows it be communicated with many devices. The Open Mobile Terminal Platform has recently published a recommendation paper which recommends Bluetooth requirements in mobile phones which covers in car usage, printing and imaging.
Bluetooth devices can transmit information like device names, list of services, device class and list of technical information on demand. Any Bluetooth device can undertake an inquiry to find other Bluetooth devices to connect to, and any Bluetooth device can usually respond to such inquires. However if a Bluetooth device that is trying to connect to another device knows the address of that other device than other devices always respond to the direct connection requests and transmit informat