Tuning Radio Specific Settings; Wmm; Figure 50: Radio Card Configuration Options - D-Link DSR-250N User Manual

Unified Services Router
4.4

Tuning Radio Specific Settings

Setup > Wireless Settings > Radio Settings
The Radio Settings page lets you configure the channels and power levels available for the AP's
enabled on the DSR. The router has a dual band 802.11n radio, meaning either 2.4 GHz or 5 GHz
frequency of operation can be selected (not concurrently though). Based on the selected operating
frequency, the mode selection will let you define whether legacy connections or only 802.11n
connections (or both) are accepted on configured APs.

Figure 50: Radio card configuration options

The ratified 802.11n support on this radio requires selecting the appropriate broadcast (NA or NG etc.)
mode, and then defining the channel spacing and control side band for 802.11n traffic. The default
settings are appropriate for most networks. For example, changing the channel spacing to 40 MHz can
improve bandwidth at the expense of supporting earlier 802.11n clients.
The available transmission channels are governed by regulatory constraints based on the region
setting of the router. The maximum transmission power is similarly governed by regulatory limits;
you have the option to decrease from the default maximum to reduce the signal strength of traffic out
of the radio.
4.5

WMM

Setup > Wireless Settings > WMM
Wi-Fi Multimedia (WMM) provides basic Quality of service (QoS) features to IEEE 802.11 networks.
WMM prioritizes traffic according to four Access Categories (AC) - voice, video, best effort, and
background.
74
User Manual