User Manual Part 2

Wireless Nd1 Router User Guide
This feature enables the Quality of Service (QoS) function that is used for multimedia
applications, such as Voice-over-IP (VoIP) and video. This allows the network packets of the
multimedia application to have priority over regular data network packets, allowing
multimedia applications to run smoother and with fewer errors.
If you enable WMM, you can then select Enable no-acknowledgement. No-
Acknowledgement refers to the acknowledge policy used at the MAC level. Enabling no-
acknowledgement can result in more efficient throughput but higher error rates in a noisy
Radio Frequency (RF) environment.
With WMM enabled, you can also select Enable APSD (Automatic Power Save Delivery).
APSD manages radio usage for battery-powered devices to allow longer battery life in
certain conditions. APSD allows a longer beacon interval until an application requiring a
short packet exchange interval starts. Voice Over Internet Protocol (VoIP) is an example of
application requiring a short packet exchange interval. APSD affects radio usage and battery
life only if the wireless client also supports APSD.
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