User's Manual
55 
DTIM (Delivery Traffic Indication 
Map) 
This is the Delivery Traffic Indication Map. It is used to alert the clients that 
multicast and broadcast packets buffered at the AP will be transmitted 
immediately after the transmission of this beacon frame. You can change 
the value from 1 to 255. The AP will check the buffered data according to 
this value. For example, selecting “1” means to check the buffered data at 
every beacon. 
Fragment Size 
A large data frame is fragmented into several fragments each of size equal 
to fragment threshold. By tuning the fragment threshold value, we can get 
varying fragment sizes. 
Short GI (Guard Interval) 
A GI is a period of time between symbol transmission that allows 
reflections (from multipath) from the previous data transmission to settle 
before transmitting a new symbol. The 802.11n draft specifies two guard 
intervals: 400ns (short) and 800ns (long). Support of the 400ns GI is 
optional for transmit and receive. The purpose of a guard interval is to 
introduce immunity to propagation delays, echoes, and reflections to 
which digital data is normally very sensitive. 
Aggregation 
A part of the 802.11n standard that allows sending multiple frames per 
single access to the medium by combining frames together into one larger 
frame. It creates the larger frame by combining smaller frames with the 
same physical source, destination end points, and traffic class (QoS) into 
one large frame with a common MAC header 
Aggregated Frames Number 
Determines the number of frames combined in the new larger frame. 
Maximum Aggregated Size 
Determines the size (in bytes) of the larger frame. 
Tx/Rx ChainMask 
Displays the number of independent spatial data streams the device is 
transmitting (TX) and receiving (RX) simultaneously within one spectral 
channel of bandwidth. Multiple chains increase data transfer performance 
significantly 
WMM Capable 
Enable the feature to access or Disable it. 
WMM Configuration 
Displays the WMM Parameters of station and Access Point 
Save 
Cancel 
Save the changed settings 
Cancel the selected settings. 
Access Control 
This  page  allows  administrator  to  have  Access  Control  by  entering  MAC  address  of  client 
stations. When this function is Enabled, MAC address can be added into access control list and 
only  those  clients  whose  wireless  MAC  address  are  in  the  access  control  list  will  be  able  to 
connect or disconnect the internet. 










