User's Manual

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.