Cisco 8821 User Manual

DescriptionField
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.
Channel utilization
Total number of spanning tree algorithms (STAs)
currently associated with this BSS.
Station count
An unsigned integer that specifies the remaining
amount of medium time available through explicit
admission control, in units of 32 microseconds per
second.
Admission capacity
Support for Wi-Fi Multimedia Extensions.WMM supported
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.
UAPSD supported
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.
Proxy ARP
Version of CCX if the AP is CCX compliant.CCX version
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
AC: Best effort, AC: Background, AC: Video, and
AC: Audio
•
Admission control
•
AIFSN
•
ECWMin
•
ECWMax
•
TXOpLimit
Cisco Wireless IP Phone 8821 and 8821-EX User Guide
93
Troubleshooting
Perform WLAN Diagnostics

Cisco 8821 Specifications

General

Wi-Fi	Yes
Ethernet LAN	No
Wi-Fi standards	802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version	3.0+HS
Security algorithms	EAP-FAST, EAP-TLS, PEAP, WPA
Networking standards	IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11d, IEEE 802.11e, IEEE 802.11g, IEEE 802.11n, IEEE 802.11r
USB 2.0 ports quantity	1
Voice codecs	G.711, G.711a, G.722, G.729, G.729ab, iLBC
Volume control	Digital
Product type	IP mobile phone
Product color	Black
Input frequency	50 - 60 Hz
AC adapter input voltage	100 - 240 V
AC adapter output current	0.2 A
Display diagonal	2.4 \
Display resolution	240 x 320 pixels
Frequency band	2.412, 2.472, 5.180, 5.240, 5.260, 5.320, 5.500, 5.700, 5.745, 5.825 GHz
Lines quantity	- lines
Phonebook capacity	- entries
Storage temperature (T-T)	-30 - 60 °C
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Safety	UL 60950-1, CAN/CSA 60950-1, EN 60950-1, IEC 60950-1, AS/NZS 60950.1, IEC 60529 (IP 67)
Certification	● 47 CFR 15 B ● ICES-003 B ● EN 55022 B ● AS/NZS CISPR 22 B ● CISPR 22 B ● VCCI B ● EN 61000-3-2 ● EN 61000-3-3 ● KN 22 B ● EN 55024 ● EN 50082-1 ● EN 61000-6-1 ● EN61000-6-3 ● EN 300386 ● EN 60601-1-2 ● KN
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	17 mm
Width	56 mm
Height	132 mm
Weight	126 g