AirLive A.DUO User Manual download pdf (Page 58)

4. Wireless and WAN Settings

51 AirLive A.DUO User’s Manual

 DTIM Interval: The A.DUO 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.

 Transmit Power: You can adjust the transmit output power of the A.DUO’s radio from

10dBm to 24dBm. The higher the output power, the more distance A.DUO can deliver.

However, it is advised that you use just enough output power so it will not create

excessive interference for the environment. Also, using too much power at close

distance can create serious performance drop due to signal distortion. At less than

200meter distance, the best output power is about 14dBm. At 2km distance; the best

output power setting is 18dBm for “11a” and “Super-A without Turbo”, 24dBm for

“Super-A with Static/Dynamic Turbo”.

 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”.

 AckTimeOut: When a packet is sent out from one wireless station to the other, it will

wait 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.

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AirLive A.DUO User Manual Page 58