AirLive WHA-5500CPE - Manual (Page 49)

4. Web Management-Wireless and WAN Settings
AirLive WHA-5500CPE User’s Manual 42
„ DTIM Interval: The WHA-5500CPE buffers packets for stations that operate in the
power-saving mode. The Delivery Traffic Indication Message (DTIM) informs such
power-conserving stations that there are packets waiting to be received by them. The
DTIM interval specifies how often the beacon frame should contain DTIMs. It should
have a value between 1 to 255, with a default value of 3.
„ User Limitation: This limitation applies to number of wireless clients the device can
associate. If you need to serve wireless connection to large number of users in one
location. You can deploy many APs and limit the number of wireless clients, so any
additional wireless connection attempt will be rejected (therefore, redirect to other AP).
The range of user limitation is from 1 to 100.
„ Age Out Timer: Set the age out timer for the wireless client. If there is no traffic from
client for more than the timer, the wireless client will be dropped. The default is 300
sec. This function is available only for the Access Point and AP router mode.
„ Rate Control: Select here to change the Data Rate for the radio. Lower data rate
sometimes provide longer distance. In most cases, however, we recommend to keep
the setting at “Best”.
„ Noise Immunity: Adaptive Noise Immunity is one of the new function in Atheros
driver to enhance the performance in interference environment.
„ AckTimeOut:
When a packet is sent out from one wireless station to the other, it will
waits for an Acknowledgement frame from the remote station. The station will only
wait for a certain amount of time, this time is called the ACK timeout. If the ACK is
NOT received within that timeout period then the packet will be re-transmitted resulting
in reduced throughput. If the ACK setting is too high, then throughput will be lost due
to waiting for the Ack Window to timeout on lost packets. If the ACK setting is too low
then the ACK window will have expired and the returning packet will be dropped,
greatly lowering throughput. By having the ability to adjust the ACK setting we can
effectively optimize the throughput over long distance links.
The easiest way to enter AckTimeOut value is by entering the distance in “Operation
Mode -> Setup -> Distance”. The WHA-5500CPE will then calculate and enter the
correct value for you.
„ Enable Radio eXtended Range: XR is Atheros eXtended technology to increase
range. When XR is turned on, the radio can increase the receiver sensitivity greatly.
However, performance may be reduced significantly also. Use this mode only if you
can trade more distance for lower performance.
„ Enable privacy separator: Select the check box to prohibit data transmission
between client stations. This function is also known as “Client Isolation”.