| Version | Status | Recommendation | |--------|--------|----------------| | 12.5(1) | Older | Only if required for specific hardware | | 12.5(1)SU1–SU8 | Supported | Use latest SU (SU8 as of 2025) | | 12.5(1)SU9 | Late release | Good for migration to 14/15 |
For the best performance, all deployments must use a VMware ESXi hypervisor that is supported by Cisco, such as versions 6.5 or higher, which is certified for call processing and system management. cucm 12.5 bootable iso download
If you want, I can:
page. While upgrade (non-bootable) images are commonly listed, bootable "Recovery Software" or full installation images may require specific entitlement. TAC Request: such as versions 6.5 or higher
CUCM 12.5 has multiple sub-versions: