User's Manual

46
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.