D-Link DWR-956M User Manual page 55

Beacon Interval: The interval between SSID beacon broadcasts. The default is 100.
RTS Threshold: The Request To Send (RTS) packet size threshold. The default is 2347.
Fragment Threshold: The maximum size of packet a client can send. The default is 2346.
DTIM Interval: The interval between Delivery Traffic Indication Messages (DTIM).
The default is 1.
Short GI (Guard Interval): Whether to enable or disable the short Guard Interval (GI).
Tick this to enable the short GI. The default is ticked.
WMM: Whether to enable or disable Wi-Fi Multimedia (WMM). Tick this to
enable WMM. The default is un-ticked.
WMM APSD: Whether to enable or disable WMM Automatic Power Save Delivery
(APSD). Tick this to enable WMM. The default is un-ticked.
Mode: 802.11a/n/ac, 802.11ac
Bandwidth: The size of the frequency range to transmit and receive on.
This can be 20 MHz, 20/40 MHz, or 80 MHz. The default is 80 MHz.
Mode: 802.11n
Bandwidth: The size of the frequency range to transmit and receive on.
This can be 20 MHz or 20/40 MHz. The default is 20/40 MHz.
Click Apply to apply the settings and click Refresh to refresh the page.