D-Link DWS-4026 Product Manual - Page 442

D-Link Unified Access System Software User Manual 12/10/09 data and media traffic is competing for bandwidth. For the b/g radio band, the classical set of non-interfering channels is 1, 6, 11. Channels 1, 4, 8, 11 produce minimal overlap. A similar set of non-interfering channels is used for the a radio band, which includes all channels for that mode since they are not overlapping. Configuring Channel Plan and Power Settings The Unified Switch software contains a channel plan algorithm that automatically determines which RF channels each AP should use to minimize RF interference. When you enable the channel plan algorithm, the switch periodically evaluates the operational channel on every AP it manages and changes the channel if the current channel is noisy. The regulation of radio frequencies and channel assignments varies from country to country. In countries that do not support channels 1, 6, and 11 on the 802.11b/g/n radio, the channel plan algorithm is inactive. For the 5-GHz radio, the algorithm is inactive in countries that require 802.11h radar detection, which includes European countries and Japan. The automatic channel selection algorithm does not affect APs that meet any of the following conditions: • The channel is statically assigned to the AP in the RADIUS or local AP database. • The channel has been statically assigned to the AP from the WLAN > Administration > AP Management > Advanced Settings page. • The AP uses a profile that has the Automatic Channel field disabled (Radio Configuration setting). If the AP is not assigned a fixed channel or is not assigned a specific channel by the automatic channel selection algorithm, the AP channel selection mode is set to best. This means that the AP selects the best channel whenever the radio restarts or if the AP detects a radar signal. The RF transmission power level affects how far an AP broadcasts its signal. If the power level is too low, wireless clients will not detect the signal or experience poor WLAN performance. If the power level is too high, the RF signal might interfere with other APs within range or broadcast the signal beyond the desired physical boundaries, which can create a security risk. Automatic power uses a proprietary algorithm to automatically adjust the RF signal to broadcast far enough to reach wireless clients, but not so far that it interferes with RF signals broadcast by other APs. To configure Channel Plan and Power Adjustment settings, click AP Management > RF Management. Figure 304: RF Channel Plan and Power Configuration Table 270 on page 443 describes the RF Channel Plan and Power Adjustment fields you can configure. Page 442 AP Management Document 34CSFP6XXUWS-SWUM100-D7