D-Link DWS 3000 Dtim Period, Beacon Period, Automatic, Manual Channel Plan, Limit Channels

D-Link Unified Access System User Manual

Table 9. Radio Settings

Field	Description
DTIM Period	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 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 field to “1”
	clients will check for buffered data on the AP at every beacon. If you set this
	field to 10, clients will check on every 10th beacon.
Beacon Period	Beacon frames are transmitted by an access point at regular intervals to
	announce the existence of the wireless network. The default behavior 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.
Automatic	The channel defines the portion of the radio spectrum that the radio uses for
Channel	transmitting and receiving. The range of channels and the default channel are
	determined by the Mode of the radio interface.
	When the AP boots, the AP scans the RF area for occupied channels and
	selects a channel from the available non-interfering, or clear channels.
	However, channel conditions can change during operation.
	Enabling the Automatic Channel makes APs assigned to this profile eligible
	for auto-channel selection. You can automatically or manually run the auto-
	channel selection algorithm to allow the WCS to adjust the channel on APs
	as WLAN conditions change.
	By default, the global auto-channel mode is set to manual. To enable the
	automatic channel selection mode, go to the AP Management > RF
	Management page and select Fixed or Interval for the Channel Plan mode.
	You can also run the automatic channel selection algorithm manually from
	the Manual Channel Plan page.
	NOTE: If you assign a static channel to an AP in the Valid AP database or on
	the Advanced AP Management page, the AP will not participate in the auto-
	channel selection.
Limit Channels	If the radio is operating in 802.11a mode, you can select the Limit Channels
	check box to allow the AP to select from the available channels.
	NOTE: The available channels depends on the country in which the APs
	operate.
	If the Limit Channels option is not selected, the AP can also broadcast on
	channels 149, 153, 157, 161, and 165. Some legacy 802.11a adapters might
	not support these higher channel numbers.

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