I'm in the process of upgrading CUCM from version 4.1.3 to 6.1.2. I have created a test environment with new servers running the newer version (6.1.2). I've tested pretty much all of the devices we currently use in our environment. All the tests have been fine except the one for the Cisco 7936 (spider) phone. It is connected on the same LAN as the new CUCM 6.1.2, on the screen it says "Upgrading... 75% complete - Do not power off" It's been like that for about 2 hours now. Can anyone assist? I don't know how to troubleshoot if there is a problem with this phone registering with CUCM... this works fine on the 4.1.3 system.