Find Information About Your Phone; Hardware Diagnostics; Perform Audio Diagnostics; Perform Keypad Diagnostics - Cisco 8821 User Manual

Troubleshooting
Symptom
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 Wireless IP Phone 8821 and 8821EX Administration Guide.
Procedure
Step 1
Access the Settings app.
Step 2
Select Phone information.

Hardware Diagnostics

You can run some diagnostic tests on your phone.

Perform Audio Diagnostics

You can check that the audio on your phone is working correctly.
Procedure
Step 1
Access the Settings app.
Step 2
Select Admin settings > Diagnostics > Audio.
Step 3
now what?

Perform Keypad Diagnostics

You can check that the keypad on your phone is working correctly.
Explanation
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).
Cisco Wireless IP Phone 8821 and 8821EX User Guide
Find Information About Your Phone
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