When an administrator has set up emergency calls, the phone requests an updated location whenever the
administrator does the following actions:
• Registers the phone with the call server.
• Restarts the phone (phone is registered).
• Changes the network interface that is used for the SIP registration.
• Changes the IP address of the phone.
Note
Perform a Factory Reset with the Phone Keypad
Use these steps to reset the phone to factory default settings using the phone keypad.
Procedure
Step 1 Unplug the phone:
• If using PoE, unplug the LAN cable.
• If using the power cube, unplug the power cube.
Step 2 Wait 5 seconds.
Step 3 Press and hold # and plug the phone back in.
When the phone boots up:
• For Cisco IP Phone 6821 Multiplatform Phones, the lights on the light strip and the line keys light up.
• For Cisco IP Phone 6841 and 6851 Multiplatform Phones, the lights on the headset button, the speaker
button, and the handset flash.
Step 4 Press the 123456789*0# keys in sequence.
For Cisco IP Phone 6821 Multiplatform Phones, when you press a key, the lights on the line keys and the
light strip flash.
For Cisco IP Phone 6841 and 6851 Multiplatform Phones, when you press 1, the handset light and the light
on the speaker button turn off.
After you press these buttons, the phone goes through the factory reset process.
If you press the buttons out of sequence, the phone powers on normally.
Do not power down the phone until it completes the factory reset process, and the main screen appears.
Caution
Maintenance
2
Maintenance
Perform a Factory Reset with the Phone Keypad
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