IP-COM AP255_US, User Manual

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Web UI functions
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4.4.4 Advanced
On this page, you can set up advanced wireless parameters of this device. You can keep the default value if you’re
not familiar with these parameters.
Parameter description
Parameter Description
Beacon Interval
Set up an interval for sending beacon frames. The range is 20~999ms.
Beacon frames are transmitted at a regular interval to allow mobile clients to join the
network. Beacon frames are used for a client to identify nearby APs. In general, the
smaller the value is, the quicker a wireless client can connect to the AP. the larger the
value is, the higher the data transmission of the WLAN network’s efficiency is.
Fragment Threshold
Set up the maximum length of frames that can be transmitted without fragmentation.
The range is 256~2346 bytes.
Fragmentation means to fragment a large frame into small pieces, with each piece
transmitted and acknowledged separately. When the length of a frame exceeds the
specified fragment threshold value, it is fragmented.
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A longer frame is less likely to be successfully received. Therefore, in a WLAN where
there is high error rate, you can decrease the fragment threshold to increase frame
transmission reliability.
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In a WLAN network with no interference, we recommend that you increase the
Fragment Threshold to improve the data transmission throughput by decreasing the
ACK times.
RTS Threshold
Set up the threshold length for RTS/CTS mechanism.
RTS/CTS frames occupy a certain network bandwidth so that only the frames larger
than RTS/CTS threshold will enable RTS/CTS mechanism to avoid data sending collisions
in a WLAN network. The RTS/CTS threshold range is 1~2347 bytes.
You need to set up a rational value: A small value causes RTS packets to be sent more
often, thus consuming more of the available bandwidth. However, the more often RTS
packets are sent, the quicker the system can recover from interference or collisions. We
recommend that you set up a small value in a high-density WLAN network to decrease
the probability of collision.
DTIM Interval
Set up the number of beacon intervals between Delivery Traffic Indication Message
(DTIM) transmissions. The range is 1~255 Beacon interval.
The AP sends buffered broadcast/multicast frames with the configured DTIM interval.
For example, if you set DTIM to 2, the AP will send buffered broadcast/multicast frames
every two Beacon intervals.
Receive Signal
Define the minimum client signal level accepted by the device. If a wireless client’s