User Manual

of such AP, and may proceed to the next actions if the information from AP matches the
requirement. Beacon is sent on a periodic basis. The time interval can be adjusted. By
increasing the beacon interval, you can reduce the number of beacons and associated
overhead, but that will likely delay the association and roaming process because stations
scanning for available access points may miss the beacons. You can decrease the beacon
interval, which increases the rate of beacons. This will make the association and roaming
process very responsive; however, the network will incur additional overhead and
throughput will go down.
DTIM Interval: The DTIM interval is in the range of 1~255. The default is 1. DTIM is defined as Delivery
Traffic Indication Message. It is used to notify the wireless stations, which support power
saving mode, when to wake up to receive multicast frame. DTIM is necessary and critical
in wireless environment as a mechanism to fulfill power-saving synchronization.
A DTIM interval is a count of the number of beacon frames that must occur before the
access point sends the buffered multicast frames. For instance, if DTIM Interval is set to
3, then the Wi-Fi clients will expect to receive a multicast frame after receiving three
Beacon frame. The higher DTIM interval will help power saving and possibly decrease
wireless throughput in multicast applications.
RTS Threshold: RTS Threshold is in the range of 1~2347 byte. The default is 2347 byte. The main purpose
of enabling RTS by changing RTS threshold is to reduce possible collisions due to hidden
wireless clients. RTS in AP will be enabled automatically if the packet size is larger than
the Threshold value. By default, RTS is disabled in a normal environment supports non-
jumbo frames.
Short Preamble: By default, its set to “Enabled”. If Disabled, the device will use Long 128-bit Preamble
Synchronization field. The preamble is used to signal "here is a train of data coming" to
the receiver. The short preamble provides 72-bit Synchronization field to improve WLAN
transmission efficiency with less overhead.
IGMP Snooping: The process of listening to Internet Group Management Protocol (IGMP) network traffic.
The feature allows a network switch to listen in on the IGMP conversation between hosts
and routers. By listening to these conversations the switch maintains a map of which
links need which IP multicast streams. Multicasts may be filtered from the links which do
not need them and thus controls which ports receive specific multicast traffic.
Greenfield: In wireless WLAN technology, greenfield mode is a feature of major components of the
802.11n specification. The greenfield mode feature is designed to improve efficiency by
eliminating support for 802.11b/g devices in an all draft-n network. In greenfield mode
the network can be set to ignore all earlier standards.
WMM: WiFi Multi-Media (WMM) will enhance the data transfer performance of multimedia
contents when they are being transferred over a wireless network
5-2-2 Signal LED Thresholds
(This feature is only available in Client Bridge + Repeater AP and CPE + Repeater AP Modes)