Справочник Пользователя для AIR802 LLC AP25N01
AP25N01 User Manual
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terminal problem. RTS/CTS packet size threshold is 0-2347 bytes. If the packet size the
node wants to transmit is larger than the threshold, the RTS/CTS handshake gets
triggered. If the packet size is equal to or less than threshold the data frame gets sent
immediately.
node wants to transmit is larger than the threshold, the RTS/CTS handshake gets
triggered. If the packet size is equal to or less than threshold the data frame gets sent
immediately.
System uses Request to Send/Clear to Send frames for the handshake which provide
collision reduction for access point with hidden stations. The stations are sending an
RTS frame first while data is sent only after handshake with an AP is completed.
Stations respond with the CTS frame to the RTS, which provides clear media for the
requesting station to send the data. CTS collision control management has time interval
defined during which all the other stations hold off the transmission and wait until the
requesting station will finish transmission.
collision reduction for access point with hidden stations. The stations are sending an
RTS frame first while data is sent only after handshake with an AP is completed.
Stations respond with the CTS frame to the RTS, which provides clear media for the
requesting station to send the data. CTS collision control management has time interval
defined during which all the other stations hold off the transmission and wait until the
requesting station will finish transmission.
Fragmentation Threshold
Specifies the maximum size for a packet before data is fragmented into multiple
packets. The range is 256-2346 bytes, or “off”. Setting the Fragmentation Threshold too
low may result in poor network performance.
packets. The range is 256-2346 bytes, or “off”. Setting the Fragmentation Threshold too
low may result in poor network performance.
The use of fragmentation can increase the reliability of frame transmissions. Because
smaller frames are sent, collisions are much less likely to occur. However lower values
of the Fragmentation Threshold will result lower throughput as well. Little or no
modification of the Fragmentation Threshold value is recommended as the default
setting of 2346 is optimum for most wireless networks.
smaller frames are sent, collisions are much less likely to occur. However lower values
of the Fragmentation Threshold will result lower throughput as well. Little or no
modification of the Fragmentation Threshold value is recommended as the default
setting of 2346 is optimum for most wireless networks.
Station Isolation
This option allows packets only to be sent from the external network to the CPE and
vice versa (applicable for AP/AP WDS mode only). If Client Isolation is enabled, wireless
stations connected to the same AP will not be able to interconnect on both layer 2
(MAC) and layer 3 (IP) level. This is effective for the associated stations and WDS peers
also.
vice versa (applicable for AP/AP WDS mode only). If Client Isolation is enabled, wireless
stations connected to the same AP will not be able to interconnect on both layer 2
(MAC) and layer 3 (IP) level. This is effective for the associated stations and WDS peers
also.
Acknowledgement Timeout
This device has an auto-acknowledgement timeout algorithm that dynamically optimizes
the frame acknowledgement timeout value without user intervention. This is a critical
feature required for stabilizing long-distance outdoor links. The user can also enter the
value manually.
the frame acknowledgement timeout value without user intervention. This is a critical
feature required for stabilizing long-distance outdoor links. The user can also enter the
value manually.
Distance
Specify the distance value in miles (or kilometers) using the slider or enter the value
manually. The signal strength and throughput falls off with range. Changing the distance
value will change the ACK Timeout to the appropriate value of the distance.
manually. The signal strength and throughput falls off with range. Changing the distance
value will change the ACK Timeout to the appropriate value of the distance.
ACK Timeout
Specify the ACK Timeout. Every time the station receives the data frame it sends an
ACK frame to the AP (if transmission errors are absent). If the station receives no ACK
frame from the AP within set timeout it re-sends the frame. The performance drops
ACK frame to the AP (if transmission errors are absent). If the station receives no ACK
frame from the AP within set timeout it re-sends the frame. The performance drops