Try unlocking the config mode on the phone itself. There is a DIFFERENT process on the SIP phones depending on whether you are using CCM 4.1 or CCM 4.2. Then try resetting it to factory. Here is a link to unlocking the Config Mode:
We bought several 7912 phones from a reseller and found that some of the phones come up with AUTO-REG in the upper right hand corner. They will not load the Call Manger configuration I set. I have reset the Phones to the Default configuration but nothing changes. I am assuming that the phones are set up for SIP, and would like to change them to SCCP. I know it is a firmware issue, but how do I load my firmware.
I configured a 7912 as SIP then changed my mind after not getting the options I wanted for the display on the phone (specifically, SIP didn't give me Line Text Label or External Phone Number Mask). When I tried to delete the phone and set it up anew as SCCP, the display on the phone showed AUTO-REG and I was unable to get into the menus successfully.
I ended up deleting the SCCP config from CUCM, then re-creating the phone as SIP in CUCM. After I was finished, the phone was again responsive. I was then able to follow gpulos instructions and now the phone is setup and working as SCCP.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.