Cisco 8821 User Manual page 103

Troubleshooting
Field
Channel utilization
Station count
Admission capacity
WMM supported
UAPSD supported
Proxy ARP
CCX version
AC: Best effort, AC: Background, AC: Video, and
AC: Audio
• Admission control
• AIFSN
• ECWMin
• ECWMax
• TXOpLimit
Perform WLAN Diagnostics
Description
Percentage of time, normalized to 255, in which the
AP sensed the medium was busy, as indicated by the
physical or virtual carrier sense (CS) mechanism.
Total number of spanning tree algorithms (STAs)
currently associated with this BSS.
An unsigned integer that specifies the remaining
amount of medium time available through explicit
admission control, in units of 32 microseconds per
second.
Support for Wi-Fi Multimedia Extensions.
Unscheduled Automatic Power Save Delivery
(UAPSD) is supported by the AP. May only be
available if WMM is supported. This feature is critical
to talk time and achieving maximum call density on
the wireless IP phone.
CCX-compliant AP supports responding to IP ARP
requests on behalf of the associated station. This
feature is critical to standby time on the wireless IP
phone.
Version of CCX if the AP is CCX compliant.
Information for each Access Category (AC). There
is one set of data for best effort, background, video,
and audio.
• Admission control—If yes, admission control
must be used prior to transmission using the
access parameters specific for this AC.
• AIFSN—Number of slots after an SIFS duration
a non-AP STA should defer before invoking a
backoff or starting a transmission.
• ECWMin—Encodes value of CWmin in an
exponent form to provide the minimum amount
of time in a random backoff.
• ECWMax—Encodes value of CWmax in an
exponent form to provide the maximum amount
of time in a random backoff.
• TXOpLimit—Interval of time in which a
particular quality of service (QoS) station has
the right to initiate
Cisco Wireless IP Phone 8821 and 8821-EX User Guide
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