User Guide

System Configuration
6-60
6
WMM – Sets the WMM operational mode on the access point. When enabled, the
parameters for each AC queue will be employed on the access point and QoS
capabilities are advertised to WMM-enabled clients. (Default: Support)
• Disable: WMM is disabled.
• Support: WMM will be used for any associated device that supports this feature.
Devices that do not support this feature may still associate with the access point.
• Required: WMM must be supported on any device trying to associated with the
access point. Devices that do not support this feature will not be allowed to
associate with the access point.
WMM Acknowledge Policy – By default, all wireless data transmissions require the
sender to wait for an acknowledgement from the receiver. WMM allows the
acknowledgement wait time to be turned off for each Access Category (AC).
Although this increases data throughput, it can also result in a high number of errors
when traffic levels are heavy. (Default: Acknowledge)
WMM BSS Parameters – These parameters apply to the wireless clients.
WMM AP Parameters – These parameters apply to the access point.
• logCWMin (Minimum Contention Window) – The initial upper limit of the random
backoff wait time before wireless medium access can be attempted. The initial wait
time is a random value between zero and the CWMin value. Specify the CWMin
value in the range 0-15 microseconds. Note that the CWMin value must be equal
or less than the CWMax value.
• logCWMax (Maximum Contention Window) – The maximum upper limit of the
random backoff wait time before wireless medium access can be attempted. The
contention window is doubled after each detected collision up to the CWMax value.
Specify the CWMax value in the range 0-15 microseconds. Note that the CWMax
value must be greater or equal to the CWMin value.
• AIFS (Arbitration Inter-Frame Space) – The minimum amount of wait time before
the next data transmission attempt. Specify the AIFS value in the range
0-15 microseconds.
• TXOP Limit (Transmit Opportunity Limit) – The maximum time an AC transmit
queue has access to the wireless medium. When an AC queue is granted a
transmit opportunity, it can transmit data for a time up to the TxOpLimit. This data
bursting greatly improves the efficiency for high data-rate traffic. Specify a value in
the range 0-65535 microseconds.
• Admission Control – The admission control mode for the access category. When
enabled, clients are blocked from using the access category. (Default: Disabled)
Key Type – See “Wired Equivalent Privacy (WEP)” on page 6-68.