D-Link DIR-620 User Manual page 66

DIR-620 Multifunction Wireless Router Supporting WiMAX, 3G GSM/CDMA
with Built-in Switch
User Manual
The WMM function allows assigning priorities for four Access Categories (AC):
AC_BK (Background), low priority traffic (print jobs, file downloads, etc.).
•
AC_BE (Best Effort), traffic from legacy devices or devices/applications that do not support
•
QoS.
AC_VI (Video).
•
AC_VO (Voice).
•
Parameters of the Access Categories are defined for both the router itself (in the WMM
Parameters of Access Point section) and wireless devices connected to it (in the WMM
Parameters of Station section).
For every Access Category the following fields are available:
Parameter
Aifsn
CWMin/CWMax
Txop
ACM
Ack
When you have configured the parameters, click the Change button.
Arbitrary Inter-Frame Space Number. This parameter influences
time delays for the relevant Access Category. The lower the value,
the higher is the Access Category priority.
Contention Window Minimum/Contention Window Maximum. Both
fields influence time delays for the relevant Access Category. The
CWMax field value should not be lower, than the CWMin field
value. The lower the difference between the
the CWMin field value, the higher is the Access Category priority.
Transmission Opportunity. The higher the value, the higher is the
Access Category priority.
Admission Control Mandatory.
If selected, prevents from using the relevant Access Category.
Acknowledgment. Answering response requests while transmitting.
Displayed only in the WMM Parameters of Access Point
section.
If not selected, the router answers requests.
If selected, the router does not answer requests.
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Configuring via Web-based Interface
Description
CWMax
field value and