Working on a CUCM 11.5 deployment where the common phone profile was updated to disable users access to the admin settings as well as disable web access. Phone was previously deployed, then removed from the system and deleted from CUCM. Now the phone boots up, but is stuck on attempting to register. If you go into preferences the option for Admin Settings is gone so I can't factory reset it that way. Is there another procedure that works to reset these phones? I'm remote so will have to walk someone through the reset process if one exists.
If done correctly, the phone will look for a DHCP and for the TFTP in option 150 to try to register, that is expected. You need to have the DHCP and TFTP ready for a factory reset.
Reconnect power to the phone while still holding the # key
Release the # key when the light on Mute goes off
Press 123456789*0#
Wait for phone to reset and come back up
User onsite said the phone rebooted and came back up and remained at Registration in Progress. I checked the switch configuration, confirmed the phone is getting an ip from the right pool as the remaining phones which includes option 150. I'll take another look at it tomorrow though.
Went onsite Friday and was able to get this done. Holding the # key prior to reconnecting the power didn't work as the phone wouldn't ever boot until I released the # (the mute light never came on, and I waited a good few minutes multiple times to make sure I didn't miss it). Found that connecting the power and then pressing the # right away worked for me.
