Bluetooth Wireless Technology

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.

Bluetooth Wireless Technology is a cordless link between two devices, in this case, a cellular telephone and the Bluetooth car kit. Bluetooth devices communicate via low-power radio waves. Bluetooth communicates on a frequency of 2.45 gigahertz which has been reserved by international agreement for the use of industrial, scientific and medical devices (ISM).

Due to the low power of the signal, approximately 1 milliwatt, a cellular telephone must be within 10 meters (32 feet) of the vehicle's Blue Tooth Module to connect and operate. However the cellular telephone and the Bluetooth module do not need to be in a direct line of sight. For example the cellular telephone can be in the center console or in a bag whilst connected to the Bluetooth car kit.

When a paired cellular telephone and the Bluetooth car kit come within range of one another, an electronic conversation automatically takes place and the devices form a personal-area network (PAN), or pico-net, in the vehicle. To avoid interference from other Bluetooth devices, the paired cellular telephone and the Bluetooth car kit, once a pico-net is established, randomly hop frequencies in unison so they stay in touch with one another and avoid other pico-nets that may be operating in the same area.