Cisco - 89XX series phone: Factory reset procedure from key pad
GOAL:
Provide instruction on how to factory reset a 89XX Cisco phone.
RESOLUTION/STEPS:
Note: When using a VPN phone please make sure that the phone is behind an ASA or a Managed Circuit before performing a factory reset as doing so can cause the phone to lose VPN functionality.
Instructions
Step 1 Remove power from the phone in one of these ways:
- Unplug the power adapter.
- Unplug the LAN cable.
Step 2 Press the pound (#) key and then plug the phone in.
Step 3 When the Headset and Speaker buttons are lit, enter the following key sequence:
123456789*0#
The phone resets.
Factory Reset is complete when the phone comes back up.
ADDITIONAL INFORMATION:
When using a VPN phone please make sure that the phone is behind an ASA or a Managed Circuit before performing a factory reset as doing so can cause the phone to lose VPN functionality.
COMMON ISSUES:
The pound key needs to be pressed and held before the phone is plugged in. Continue to hold until you see the speaker buttons illuminate.