The primary extension radio button tells the system what the primary extension is on the IP phone. For example, if you have a 7960, you may have 6 extensions, some of which may be shared, but 1 is your specific extension and associated with your voicemail box.
If you have a 7960 or a 7940 phone you can select the line you want to unconditionally forward, push cfwdall softkey, and enter the extension you want it to unconditionally forward to. If you want to remove the forward, select the line again and push cfwdall again and it will remove the forward. You can also do this from the call manager by going into the phone and selecting the line and filling in the call forward all box.
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.