What to do if the softkey I want does not appear on my Cisco 8821?
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.
Why does my Cisco IP Phone show an error when setting up Call Forward All?
Your phone might 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 exceed the maximum number of links permitted in a Call Forward All chain.
What to do if Cisco IP Phone shows error when setting up Call Forward All?
If your Cisco IP Phone shows an error message when setting up Call Forward All, it's because the target number would create a Call Forward All loop or exceed the maximum number of links permitted in a Call Forward All chain. Try a different number to avoid this issue.
Why can't I complete a call on my Cisco 8821?
Several factors could prevent you from completing a call. You might be outside the wireless network access point service area—a blinking green light indicates you're still within coverage. Alternatively, you may need to log in to the Extension Mobility service or enter a client matter code or forced authorization code after dialing. It's also possible that time-of-day restrictions are in effect, preventing feature use during certain hours.
What to do if my Cisco 8821 IP Phone shows a fast busy tone when barging?
If your Cisco IP Phone plays a fast busy tone when you attempt to barge, it could be because you are trying to barge an encrypted call and your phone isn't configured for encryption. Also, you cannot barge a call on another Cisco Wireless IP Phone.
What to do if the main screen is not active on my Cisco IP Phone?
The main screen may be inactive due to several reasons: The network might be busy, lacking sufficient bandwidth. The phone could be out of range of its access point. It might be searching for a wireless network access point, or authentication could have failed. Another possibility is that the phone is waiting for DHCP to assign an IP address. If the network is busy, try again later.
What happens if I am disconnected from a call joined using Barge on my Cisco 8821 IP Phone?
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.
Why is the Settings menu unresponsive on my Cisco 8821?
The Settings menu might be unresponsive because your administrator has disabled access to the Settings app on your phone.
Why does conference fail on my Cisco 8821 IP Phone?
A conference requires multiple selected calls. Ensure you've selected at least one call in addition to the active call, which is automatically selected. Also, the selected calls must be on the same line. If needed, transfer calls to one line before joining them.
Why does call back fail on my Cisco 8821?
Call back may fail because the other party might have call forwarding enabled.
Instructions for initial setup, including reading safety information and charging.
Procedure for installing and charging the phone's battery before use.
Information on charging the phone battery using various methods.
Methods for configuring the phone for network and call control system connection.
Steps to connect the phone to a Wi-Fi network.
Instructions on how to make calls from the phone.
Procedures for answering incoming calls.
Steps to transfer an active call to another party.
Connecting and managing Bluetooth headsets and speakers.
Common phone problems and their potential causes and solutions.
Checking and viewing details of the Wi-Fi connection and access points.
Essential safety notices before installing or using the wireless IP phone.
General safety guidelines for using the phone in various environments.
Important safety notices and warnings related to phone batteries.
Information on operating the phone in potentially explosive atmospheres.
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 |
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