The most notable technical aspect of this filename is the extension.
Then the ISO screamed to life. Files unpacked in a cascade of green [OK] tags. Unpacking UCOS base image... Installing kernel 3.10.0-957.el7... Creating software RAID 1... Bootable UCSInstall UCOS UNRST 8.6.2.10000-14.sgn.iso
This ISO file is primarily used by network engineers for two main purposes: The most notable technical aspect of this filename
To move from CUCM 7.x to 8.6.2, you often need a fresh installation of 8.6.2 using this ISO, followed by restore of a 7.x backup (if supported) or data migration. Bootable UCSInstall UCOS UNRST 8.6.2.10000-14.sgn.iso
Since .sgn files are signed and the raw ISO doesn't have a boot sector, you need to modify it using an ISO editor like or MagicISO .
