User's Manual

70
Advanced Settings
Fields Description
RTS/CTS Threshold
Determines the packet size of a transmission and, through the use of an AP, helps
control traffic flow. The range is 0-2347 bytes.
Beacon Interval Beacons are the packets sending by Access point to synchronize the wireless
network. The beacon interval is the time interval between beacons sending by this
unit in AP or AP+WDS operation. The default and recommended beacon interval is
100 milliseconds.
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