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Chapter 16: Configuring 802.11 Radio Settings
Configuring Radio Settings
Table 16.1 Radio Settings
Field
Extended
Range
Channel
Beacon Inter-
val
DTIM Period
170
Psion Teklogix 9160 G2 Wireless Gateway User Manual
Description
Atheros Extended Range (XR) is a proprietary method for implementing low rate traffic over longer distances. It
is transparent to XR enabled clients and access points and is designed to be interoperable with the 802.11
standard in 802.11g and 802.11a modes. There is no support for Atheros XR in 802.11b, Atheros Turbo 5 GHz,
or Atheros Dynamic Turbo 5 GHz.
Enabling Atheros XR will extend the range over which your client and access point can operate.
• To enable Extended Range, click Enabled.
• To disable Extended Range, click Disabled.
This option will not be available if you selected the hardware mode IEEE 802.11b, Atheros Turbo 5 GHz, or
Atheros Dynamic Turbo 5 GHz. Atheros XR is not supported by these hardware modes.
The Channel defines the portion of the radio spectrum that the radio uses for transmitting and receiving. The
range of channels and the default channel are determined by the Mode of the radio interface.
For most Modes, the default is Auto. Auto is the recommended mode because it automatically detects the best
channel choices based on signal strength, traffic loads, and so on. However, you can also select a channel
between one and eleven, inclusively.
Beacon frames are transmitted by an access point at regular intervals to announce the existence of the wire-
less network. The default behaviour is to send a beacon frame once every 100 milliseconds (or 10 per second).
The Beacon Interval value is set in milliseconds. Enter a value from 20 to 2000.
The Delivery Traffic Information Map (DTIM) message is an element included in some Beacon frames. It
indicates which client stations, currently sleeping in low-power mode, have data buffered on the access point
awaiting pick-up.
The DTIM period you specify here indicates how often the clients served by this access point should check for
buffered data still on the AP awaiting pickup.
Specify a DTIM period within the given range (1 - 255).
The measurement is in beacons. For example, if you set this to 1, clients will check for buffered data on the AP
at every beacon. If you set this to 2, clients will check on every other beacon. If you set this to 10, clients will
check on every 10th beacon.
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