I have the following doubt: I need to do upgrade version 4.1 to 5.1 to be using in the laboratory. I have the 03 machines
show the MCS-7825SE.
My question is: It´s possible using any hardware informed to do the upgrade 4.1 to 5.1? I know the signficate I = IBM H= HP, and SE?
Cudos to Rob, as usual. High five (points, that is). The SE designation that you asked about is an old server platform which was basically a custom MCS configuration geared towards small customers (less than 100 users, typically). I don't recall if SE was the obvious designation of "Special Edition" or if it was short for "Small Business Edition" - not equivalent to today's CUCM BE but just simply being hardware geared towards small deployments like I noted above.
Of all the versions of CUCM that have come out, 5x was the first and likely the worst so I am curious as to what's driving you to want to test CUCM 5x in your lab. If it's a matter of "this is what my hardware can support" then that would be one thing especially if it's just a lab. However, I would not consider that version of code as an upgrade path for a production system running 4x.
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The 7825H2 should work
This is the "master" list for Server support, which does show support for your box in CUCM 5.1(x);
Supported Cisco Unified Communications Manager Releases by Server
Hope this helps!