factory reset on 7911


1) make sure the correct phone loads  are on the system
2) set switch port to
speed 100
duplex full

3)Hold down the # key on the phone, when powering up the phone

4) wait for the MWI light on the handset to start flashing.

5) Once the MWI light is flashing, release the # key and enter the following sequence:


the MWI light will flicker and the phone will turn off, give it 10-15 mins and it will start upgrading and then it will work 🙂


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