Currently have this cluster config:
MCS-7825-H3 with 2GB RAM and Two 160GB SATA HD: MCS-7825-H3-IPC1
CUCM 18.104.22.1680-13, no ES.
Checking the upgrade matrix - Table 7 Supported Cisco Unified Communications Manager Upgrades for Release 6.1(5x), I don't see where I can jump to 6.1.5. Am I reading that correct, that is, would I first need to upgrade to 6.1.4+ before I can upgrade to 6.1.5?
Or am I better off just upgrading to version 7.0.2 and then proceeding along the 7.x upgrade path?
Yes, you are reading it correctly.. you often have to hop through different versions.
I would normally go to the latest version you can if you are going to the effort of upgrading... the 7.x releases have been quite stable so I would aim to get to a 7.1 release.
Of course, I'm assuming that you have a good reason to upgrade - I would normally only upgrade in order to get a particular feature, address security alerts, or to maintain supportability...
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