D-Link DWS-3024 Product Manual - Page 91
DTIM Period, Beacon Period, Automatic, Channel, Automatic Channel, AP Management > RF, Management
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5 Configuring Access Point Settings Table 9. Radio Settings Field DTIM Period Beacon Period Automatic Channel Limit Channels Description 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 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. 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. 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 autochannel selection algorithm to allow the Unified Switch 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 autochannel selection. 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. Configuring Wireless Radio Settings 91