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Cisco 8821 User Manual

Cisco 8821
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CHAPTER 9
Troubleshooting
General Troubleshooting, page 89
Find Information About Your Phone, page 91
Hardware Diagnostics, page 91
General Troubleshooting
You can troubleshoot some general problems with your phone. If your problem is not discussed below, contact
your administrator.
ExplanationSymptom
One or more of the following factors might apply:
Your phone is out of the wireless network access point service
area.
When roaming with your phone, a green blinking
light indicates that the phone is still within the
wireless service coverage area.
Note
You must log in to the Extension Mobility service.
You must enter a client matter code or forced authorization
code after you dial a number.
Your phone has time-of-day restrictions that prevent you from
using some features during certain hours of the day.
You cannot complete a call
Cisco Wireless IP Phone 8821 and 8821-EX User Guide
89

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Cisco 8821 Specifications

General IconGeneral
Wi-FiYes
Ethernet LANNo
Wi-Fi standards802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version3.0+HS
Security algorithmsEAP-FAST, EAP-TLS, PEAP, WPA
Networking standardsIEEE 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 quantity1
Voice codecsG.711, G.711a, G.722, G.729, G.729ab, iLBC
Volume controlDigital
Product typeIP mobile phone
Product colorBlack
Input frequency50 - 60 Hz
AC adapter input voltage100 - 240 V
AC adapter output current0.2 A
Display diagonal2.4 \
Display resolution240 x 320 pixels
Frequency band2.412, 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 %
SafetyUL 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 included1 pc(s)
Harmonized System (HS) code85171800
Weight and Dimensions IconWeight and Dimensions
Depth17 mm
Width56 mm
Height132 mm
Weight126 g

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