| The networking standards of Bluetooth will | | | | utilizes a technique known as low frequency |
| transmit data via low power radio frequency. | | | | hopping, which makes it harder for more than one |
| Bluetooth communicates on a 2.45 GHz | | | | device to transmit on the same frequency at the |
| frequency. This very band of frequency has been | | | | same time. |
| set aside by international agreement for the use | | | | With this technique, a device will use 79 individual, |
| of industrial and medical devices. | | | | randomly chosen frequencies within a designated |
| Many devices that you already known and use | | | | range, which change from one another on a |
| take advantage of this frequency band. Garage | | | | regular basis. |
| door openers, baby monitors, and the next | | | | In the case of Bluetooth, the transmitters will |
| generation of mobile phones all use this frequency | | | | change frequency 1,600 times or more every |
| within the ISM band. Ensuring that Bluetooth and | | | | second, meaning that more devices can make full |
| the other devices don't interfere with each other | | | | use of the radio spectrum. Since every |
| is a crucial part of the design process. | | | | transmitter of Bluetooth will use spread spectrum |
| One of the ways Bluetooth will avoid interfering | | | | automatically, it's very unlikely that two |
| with other electronic devices is by sending out | | | | transmitters will be on the same frequency at the |
| weak signals of around 1 mw. In comparison, | | | | exact same time. |
| even the most powerful of cell phones can | | | | When the Bluetooth devices come within close |
| transmit a signal of 3 watts. | | | | range of each other, an electronic conversation |
| The low power signals will limit the range of a | | | | will occur to determine whether or not they have |
| Bluetooth device to around 32 feet, which cut the | | | | data to share or whether one needs to take total |
| chances of interference between your computer | | | | control. The user doesn't have any buttons to |
| and other electronic devices. Even though it has | | | | press or commands to give - as the conversation |
| low power, Bluetooth doesn't require a line of | | | | will occur automatically. |
| sight between the communicating devices. The | | | | Once the conversation has occured, the devices |
| walls in your home won't stop the signal, making it | | | | will form a network. Bluetooth devices will create |
| great for rooms throughout the house. | | | | a PAN (Personal Area Network) or piconet that |
| Bluetooth can connect 8 devices at the same | | | | may fill a room. Once the piconet has been |
| time. With each of those devices on the same | | | | established, the devices will randomly hop in |
| radius, you may think they would interfere with | | | | frequencies. |
| each other, although it's very unlikely. Bluetooth | | | | |