I have upgrede the CUCM from 9 to 10.
I have publisher CUCM 10.X version.
I would like to innstal the subscriber, but I have only CUM 9.1 bootable image.
Is it possieble to install sub 9.1 when publisher is 10 or the subsriber version must be the same like publisher ?
Thanks in advance
This begs the question: how did you get the CUCM 10 publisher installed if you lack a bootable ISO? If this is a BE6k you may want to browse the ESXi datastores as it likely exists on one of them. If a Cisco partner did the install on your behalf, ask them to supply these to you. You would need them for disaster recovery purposes anyway.
If for some reason none of that is possible, just submit a PUT order to go from 9.x to 10.x and it will issue you a bootable ISO download link. If you lack a ESW/UCSS contract - which would be mighty confusing since this sounds like a very recent deployment - then your only option would be to speak with your Cisco AM/SE. None of us can legally supply you with this directly.
That only works with patches, not with major upgrades, 9 to 10 is a RU because of the OS change