If you’re planning a new deployment or a major upgrade to Unified Communications Manager 12.5 , finding the correct download link isn’t as simple as a quick Google search. Cisco locks its software behind a paywall to ensure only licensed users get access.

Here is the official process, the prerequisites, and a few tips for navigating Cisco’s website. You cannot download CUCM 12.5 without a valid Cisco SmartNet or service contract.