one of our customer wants to upgdate their CUCM from 7.1.3 to 9.1.
Hardware Used : MCS 7825I4 two clustered Publisher / Subscriber servers.
can we install the new version on these servers ??
how the license will be migrated?
7825 I4 shows supported with memory/HDD upgrades listed at the bottom of the link
License migration is discussed in detail here. Need partner access
Do keep in mind that 10.0 will be a virtual only release so 9.1 will be the last release to support MCS. If you don't move now you will have to make that jump eventually in 10.0 to virtual