Cisco 8821 User Manual

Adjust the Headset Feedback
When you use a headset, you might hear your own voice in the earpiece, which is called headset sidetone or
headset feedback. You can control the amount of headset sidetone on your phone.
Procedure
Step 1
Access the Settings app.
Step 2
Select Phone settings > Sounds > Headset sidetone
Step 3
Select one of the options.
Turn Off the Keypad Sounds
You can turn off the sounds on the keypad so that you don't hear sounds when you press a button.
Procedure
Step 1
Access the Settings app.
Step 2
Select Phone settings > Sounds > Keypad tone
Step 3
Press On to turn the tones on or press Off to turn the tones off.
Adjust the Background Noise Filter
You can adjust the sensitivity of the phone microphone to filter out background noise so that the other person
on your call can hear you better.
Procedure
Step 1
Access the Settings app.
Step 2
Select Phone settings > Sounds > Background noise filter
Step 3
Select one of these settings: Off, Low, Medium, High.
The default is Off.
Adjust the Screen Brightness
You can adjust the brightness of the phone display.
Cisco Wireless IP Phone 8821 and 8821-EX User Guide
67
Settings
Access Phone Settings

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