just to get the basic steps down. we have a CCM 4.0 currently and need to migrate to a 6.1.2. the customer ordered the 6.1 preinstalled server already. can we use the DMA. im seeing that we need to have 4.1 to go to 6.1 so im assuming no.
if thats the case i suppose we will just have to rebuild from scratch.
Hope all is well! Just to add a note to the good info from Jaime. If you want to use DMA rather than rebuilding then I would go to CCM 6.x with DMA (from CCM 4.0) and then complete the upgrade to CCM 6.1(2)
I'm pretty sure that the upgrade paths from 4.0(2a) are as follows;
4.0(2a) to 5.0(4) = Direct
4.0(2a) to 5.1.x = Via 4.1(3) *Two Steps
4.0(2a) to 6.0.x = Direct
4.0(2a) to 6.1.x = Via 6.0(x) *Two Steps
Have a close look at this excellent doc;
Cisco CallManager Upgrade Paths and Cisco Unified Communications Product Names
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