Cisco 8821 Troubleshooting

Cisco 8821 Wireless Phone Troubleshooting
Contents
Introduction
Microphone Audio
Procedure
For phones running firmware versions 11.0(5) and later
For phones running firmware versions prior to 11.0(5)
Verification
Phone Will Not Power On (Boot)
Procedure
Verification
Phone Will Not Charge
Procedure
Verification
MIC (Manufacturer Installed Certificate) Not Installed
Procedure
Verification
Introduction
This article describes how to confirm the functionality of different components of the Cisco 8821
wireless phone.
Microphone Audio
(CSCve15706 )
Certain phone covers or cases have been found to cause or contribute to microphone failures with
the Cisco 8821 phone. Please discontinue using phone covers or cases to prevent damage to the
microphone. External documentation can be found here - Cisco Wireless IP Phone 8821 Support
for Third-Party Cases and Covers.
There may be a need to confirm the functionality of the Cisco 8821 wireless phone microphone
while investigating a one way or no way audio situation.
Procedure
For phones running firmware versions 11.0(5) and later
The 11.0(5) release includes Audio Diagnostics support to help triage current hardware to
determine if the microphone, handset speaker, or handsfree speaker are faulty or not.
Step 1. Audio Diagnostics can be accessed at Settings > Admin settings > Diagnostics >
Audio.

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