If the checksums do not match , delete the ISO immediately.
Products → Unified Communications → Call Control → Unified Communications Manager (CallManager) → Unified Communications Manager (CUCM) Version 12.5 cucm 12.5 bootable iso download
CUCM 12.5 fits on a standard dual-layer DVD (approx. 4-5 GB). Use: If the checksums do not match , delete the ISO immediately
Provided as part of the initial shipment or available in the datastore for new hardware. If the checksums do not match
Once you have successfully downloaded and verified the CUCM 12.5 ISO image, you can proceed with the installation and configuration:
If you are unable to find the CUCM 12.5 ISO image on the Cisco website, you can try the following alternative method:
Replace /path/to/iso/image with the path to the ISO image and /dev/sdX with the device name of the USB drive.