Re: The cisco phone 7961G doesn't boot after a reset factory !
After factory reset, the phone has to get TFTP address from DHCP. After downloading the config file and firmware, the phone will try to register to CM based on the address specified in the config file.
If DNS was not populated via DHCP, make sure you use IP address instead of hostname at CUCM > System > Servers.
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.