Full Factory Reset
From ip tuning
Full Factory Reset (Recovery Process)
Apparently there is a another full factory reset on the 7911 (I've only tested on a 7911, but I guess it works on any Java phones).
Besides the now common <power> + # <wait for mwi blink> + <release #> + 1234567890*0# combination, there is this other combination:
- If powered, unpower the phone;
- Press the
#key and power up the phone (PoE - insert Ethernet cable, non-PoE, insert powerbrick plug); - Wait until MWI light starts flashing;
- Release the
#key; - Press
3491672850*#; - Phone screen goes blank.
Apparently this erases all the phone. Screen goes blank but phone is still doing basic TFTP. Wait about 5~10 min. Then standard upgrade screen appears. Then the phone starts the normal upgrade process.
This method is useful if any VLAN or certificate configuration is trapped inside a phone that was configured with "Settings Restricted".
