Question : CCM 4.2(1) migration to CUCM 7.x migration

Hi,

I am in the process of migrating my company's CallManager 4.2(1) servers to new CallManager 7.0 servers. However, after reviewing and trying to use the DMA tool to perform the migration I see that this does not work. The tool only operates on CCM 4.1(3), 4.2(3), and 4.3. My company has CUWL licensing for all of our devices, so we are entitled to CUCM 4.3 as well as CUCM 7.x. We have a new publisher server and a new subscriber server, and the new servers are compatible with CUCM 7.x. So, we can make the cutover quickly without much interruption in service.

Here are my questions:

1) Am I safe to assume I will need to first migrate the server to CCM 4.2(3) or CUCM 4.3 before I can migrate to 7.0?

2) Also, am I able to use BARS to perform the migration from CCM 4.2(1) to CUCM 4.3?

3) Finally, if I do need to migrate to 4.3 do I need to do anything with the licensing with this in-between step? Can I just request for the licenses for 7.0 once I fully move to CUCM 7.0, or do I need to register the licenses for 4.3 as well?

I'd also appreciate any best practice steps others have done to accomplish this. I appreciate any assistance anyone can provide.

Answer : CCM 4.2(1) migration to CUCM 7.x migration

just go and upgrade from 4.2(1) to 4.2(3) then it should work. but please go through the steps i posted because it is critical.