Cisco 8821 User Manual

ExplanationSymptom
One of these messages appears on the status line:
•
Network busy: Not enough available bandwidth exists in
wireless network to complete this call. Try again later.
•
Leaving service area: Phone is out of range of its
associated access point and wireless network.
•
Locating network services: Phone is searching for
a wireless network access point.
•
Authentication failed: Authentication server did
not accept the security credentials.
•
Configuring IP: Phone is waiting for DHCP to assign
an IP address.
The main screen is not active
Your administrator might have disabled access to the Settings app
on your phone.
The Settings menu is unresponsive
Conference requires multiple selected calls. Be sure that you have
selected at least one call in addition to the active call, which is
selected automatically. Conference also requires the selected calls
to be on the same line. If necessary, transfer calls to one line before
joining them.
Conference fails
One or more of the following factors might apply:
•
You must press More to reveal additional functions.
•
You must change the line state (for example, place a call or
have a connected call).
•
Your phone is not configured to support the feature associated
with that softkey.
The softkey that you want to use does
not appear
One or more of the following factors might apply:
•
You cannot barge an encrypted call if the phone you are using
is not configured for encryption. When your barge attempt
fails for this reason, your phone plays a fast busy tone.
•
You cannot barge a call on another Cisco Wireless IP Phone.
Barge fails and results in a fast busy
tone
You are disconnected from a call that you joined using Barge if
the call is put on hold, transferred, or turned into a conference call.
You are disconnected from a call that
you joined using Barge
The other party might have call forwarding enabled.Call back fails
Cisco Wireless IP Phone 8821 and 8821-EX User Guide
90
Troubleshooting
General Troubleshooting

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