Dell PowerConnect W-IAP92 Dell Instant 6.1.3.4-3.1.0.0 User Guide - Page 160

 Disabled- Disabled means that the clients selects which band to use. Airtime Fairness Mode This feature provides equal access to all clients on the wireless medium, regardless of client type, capability, or operating system, thus delivering uniform performance to all clients. This feature prevents some clients from monopolizing resources at the expense of other clients. NOTE: Reboot the IAP after configuring the radio profile settings in order for the changes to take effect. Airtime Fairness Modes Navigate to RF which is at the top right corner of the Instant UI and click ARM. The Airtime fairness consists of the following modes:  Default Access- Provides access based on the client request. When Air Time Fairness is set to default access, per user and per SSID bandwidth limits are not enforced  Fair Access- Allocates Airtime evenly across all the clients  Preferred Access- 11n clients get more airtime than 11a/11g, which get more airtime than 11b. The ratio is 16:4:1. Figure 135 Airtime fairness mode Access Point Control Customize Valid Channels You can customize the Valid 5GHz channels for 20MHz channels and the Valid 2.4 GHz channels for 20MHz channels in the IAP. Here, the administrator can configure the ARM channels in the channel width window. The valid channels automatically show in the static channel assignment window. 160 | Adaptive Radio Management Dell PowerConnect W-Series Instant Access Point 6.1.3.4-3.1.0.0 | User Guide