Factory Reset of CISCO 7911, 7906 and 794x IP phone

To perform a FACTORY RESET
Note: The phone must be on a DHCP-enabled network before you can perform these steps.

Step 1 Unplug the power cable from the phone and then plug it back in.
The phone begins its power up cycle.

Step 2 While the phone is powering up, and before the speaker button flashes on and off,
press and hold #.

Continue to hold # until each line button flashes on and off in sequence in amber.

Step 3 Release # and press 123456789*0# in sequence to do proper factory reset.

After you press these keys, the line buttons on the phone flash red and the phone goes through the factory reset process. The process will take time to reset. During factory reset do not power down the phone until it completes the factory reset process and the main screen appears.

If the process take more than 10 minutes then inform your vendor about this.

Factory reset will  erased or reset to following to its default value

•CTL file—Erased
•User configuration settings—Reset to default values
•Network configuration settings—Reset to default values
•Call histories—Erased
•Locale information—Reset to default values
•Phone application—Erased (phone recovers by loading the term11.default.loads file)