Cisco 8821 User Manual

ExplanationSymptom
Your phone may reject your attempt to set up Call Forward All
directly on the phone if the target number that you enter would
create a Call Forward All loop or would exceed the maximum
number of links permitted in a Call Forward All chain (also known
as a maximum hop count).
The phone shows an error message
when you attempt to set up Call
Forward All
Find Information About Your Phone
Your administrator may ask for information about your phone. This information uniquely identifies the phone
for troubleshooting purposes. The information in the menu is read-only. For more information about the menu,
see the Cisco Cisco Wireless IP Phone 8821 and 8821EX Administration Guide for Cisco Unified
Communications Manager.
Procedure
Step 1
Access the Settings app.
Step 2
Select Phone information.
Hardware Diagnostics
You can run some diagnostic tests on your phone.
Perform WLAN Diagnostics
You can check the Wi-Fi connection for your phone. The phone lists the access points in order, from the
strongest signal to the weakest or offline access point. You can then view details of the wireless access point.
Procedure
Step 1
Access the Settings app.
Step 2
Select Admin settings > Diagnostics > WLAN.
Step 3
Press Continue.
Step 4
Scroll to an access point and press Select to see detailed information about the access point.
Cisco Wireless IP Phone 8821 and 8821-EX User Guide
91
Troubleshooting
Find Information About Your Phone

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