Wireless
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Removing a Wi-Fi Network
To remove a remembered or connected network:
1. Swipe down from the status bar to open the quick access panel and then touch .
2. Touch Network & Internet > W-Fi.
3. Scroll down to the bottom of the list and touch Saved networks.
4. Touch the name of the network.
5. In the dialog box, touch FORGET.
6. Touch .
Bluetooth
Bluetooth devices can communicate without wires, using frequency-hopping spread spectrum (FHSS) radio
frequency (RF) to transmit and receive data in the 2.4 GHz Industry Scientific and Medical (ISM) band
(802.15.1). Bluetooth wireless technology is specifically designed for short-range (10 m (32.8 ft))
communication and low power consumption.
Devices with Bluetooth capabilities can exchange information (e.g., files, appointments, and tasks) with other
Bluetooth enabled devices such as printers, access points, and other mobile devices.
The device supports Bluetooth Low Energy. Bluetooth Low Energy is targeted at applications in the healthcare,
fitness, security, and home entertainment industries. It provides reduced power consumption and cost while
maintaining standard Bluetooth range.
Adaptive Frequency Hopping
Adaptive Frequency Hopping (AFH) is a method of avoiding fixed frequency interferers, and can be used with
Bluetooth voice. All devices in the piconet (Bluetooth network) must be AFH-capable in order for AFH to work.
There is no AFH when connecting and discovering devices. Avoid making Bluetooth connections and
discoveries during critical 802.11b communications. AFH for Bluetooth consists of four main sections:
• Channel Classification - A method of detecting an interference on a channel-by-channel basis, or
pre-defined channel mask.
• Link Management - Coordinates and distributes the AFH information to the rest of the Bluetooth network.
• Hop Sequence Modification - Avoids interference by selectively reducing the number of hopping channels.
• Channel Maintenance - A method for periodically re-evaluating the channels.
When AFH is enabled, the Bluetooth radio “hops around” (instead of through) the 802.11b high-rate channels.
AFH coexistence allows enterprise devices to operate in any infrastructure.
The Bluetooth radio in this device operates as a Class 2 device power class. The maximum output power is 2.5
mW and the expected range is 10 m (32.8 ft). A definition of ranges based on power class is difficult to obtain
due to power and device differences, and whether in open space or closed office space.
NOTE: It is not recommended to perform Bluetooth wireless technology inquiry when high rate 802.11b operation is required.
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