learn how to employ bluetooth ISM 2.4GHZ is a worldwide standard radio band which bluetooth technology uses. Global compatibility is its greatest value. A disadvantage to this however, is that the devices must share this band with other RF emitters. This includes automobile security systems, other wireless devices, and other noise sources, just like microwaves. More guidelines can be found on our affordable business systems san diego site. To overcome this problem, Bluetooth employs a fast frequency hopping scheme and thus uses shorter packets than other standards within the ISM band. This scheme helps to make Bluetooth communication more robust and safer for use in business phone systems. Channel to channel changing is all Frequency hopping is within the ISM radio band. After a bluetooth device sends or receives a packet, it as well as device (or devices) it's communicating with hop to a different frequency before the next packet is sent. The clear advantage is, ISM radio band with this scheme makes the entire band available for bluetooth, while never transmitting from a fixed frequency for more than a short period of time. This helps insure that Bluetooth conforms to the ISM restrictions on the transmission quantity per frequency. Another great feature, any time you do happen to acquire interference it will clear up with the next packet exchange. And Finally, it makes taping you communications virtually impossible because of the frequency changes. The result it becomes a nice option for business phone systems that require security for your wireless phones. Seven devices can operate off of one master device. To each of the slaves, the master Bluetooth device will send its own unique address and the value of its own internal clock. The information sent is then used to calculate the frequency hop sequences. Battery powered mice and cell phones are devices and eliminate the need for cabling.