General Troubleshooting Information - Cisco 7920 - Unified Wireless IP Phone VoIP Administration Manual

Chapter 9 Troubleshooting the Cisco Wireless IP Phone 7920
Table 9-1 Cisco Wireless IP Phone Troubleshooting (continued)
Summary
Phone is locked
Phone firmware downgrades
Battery life is shorter than specified
Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 4.0 and 4.1
OL-7104-01
Explanation
If you press a key and see the message, "KeyLocked," the
keypad is temporarily locked. Press and hold the pound (#) key
to unlock the keypad. When prompted with the message,
"Keylock off?" press OK to unlock the keypad.
When powering on the phone, if you are prompted to enter a
password, try entering the default password, 12345 and
pressing OK. If this password unlocks the phone, the phone
associates with the access point.
If these options do not unlock the phone, you must call Cisco
Technical Assistance Center (TAC) to have the phone unlocked.
Note
After applying a Cisco CallManager upgrade or patch, that is
older than the current Cisco Wireless IP Phone 7920 firmware,
the phones could automatically downgrade to the load
contained in the patch. Check the Cisco CallManager 7920
device default image in the TFTP folder to fix this problem.
An unstable RF environment can cause the phone to remain in
active mode because it is constantly seeking an AP. This
reduces the battery life considerably. When leaving an area of
coverage, shut down the phone.
Vibrate mode can reduce battery life, but back light should not
affect the battery.
Higher phone transmit power can affect battery life.
To maximize idle time on the phone and conserve battery life,
you need to optimize the registration time so the phone can go
into power save mode more often.
Related Topics
Logging Information for Troubleshooting, page 9-20
•
Troubleshooting Information for Basic Problems, page 9-28
•
When TAC uses the master password to unlock a phone,
all configuration is lost including the phone book
entries.

General Troubleshooting Information

9-19