As per the title, we have an issue with phones failing to register if they leave the network due to their location (then return) or rebooting. What I see as strange is that other phones that have remained in the network are fine.
The defective phones network configuration is correct and they are connected to the network and accessible via http. Both TFTP servers are listed on the phones. I restarted the TFTP service on both servers to see if that would make a difference but it didn’t.
There have been no recent changes before this issue.
I tried installing RTMT to gain some extra insight but it installs with errors every time (log file says “ERROR while attempting to execute the installation script” when the install attempts to update time zones tables on Machine and when copying security jars onto windows machine. It’s also unable to create the desktop shortcut).
My knowledge of CUCM is fairly basic so any help would be appreciated.