D-Link DWC-1000 User Manual page 78

Wireless Controller
APSD Mode: Select Enable to enable Automatic Power Save Delivery
(APSD), which is a power management method. APSD is recommended if
VoIP phones access the network through the AP.
RF Scan Interval: This field controls the length of time between channel
changes during the RF Scan.
Long Retries The value in this field indicates the maximum number of
transmission attempts on frame sizes greater than the RTS Threshold. The
range is 1-255.
Rate Limiting: Enabling multicast and broadcast rate limiting can improve
overall network performance by limiting the number of packets transmitted
across the network. This feature is disabled by default.

Note: The available rate limit values are very low for most environments, so
enabling this feature is not recommended except for advanced users.
•
To enable Multicast and Broadcast Rate Limiting, click Enabled.
•
To disable Multicast and Broadcast Rate Disabled, click Disabled.
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User Manual