: For certification studies (like CCNP Collaboration), students often use the Cisco DevNet Sandbox or purchase the Partner Demo Lab and Training Bundle (NFR). Creating a Bootable ISO from a Non-Bootable Image
If you have the ISO, here’s what it expects: cucm 12.5 bootable iso download
Before downloading the ISO, ensure your system meets the minimum requirements for CUCM 12.5: cucm 12.5 bootable iso download