I have old UCM 5.1(3f) and install ISO image of UCM 7.1. Is it possible to make fresh intsall of UCM 7.1 and upload old license files (DLU for phones) from UCM 5.1 to 7.1? There is no server replacement - 7.1 replace 5.1 on the same server.
Yes, this does get very complicated, and the fact that you are @ 5.1(3) adds some extra considerations :)The truth of the matter is that I don't see any upgrade path currently available that doesn't require ordering the media for this. Have a look at the restrictions below;
Supported Cisco Unified Communications Manager Upgrades for Release 5.x
Cisco Unified Communications Manager 5.1(3f)*
*If you upgrade to this release, you cannot then upgrade from this release to Cisco Unified Communications Manager Release 6.0(1), Release 6.1(1), Release 6.1(2), or Release 7.0(1). You may only upgrade to Cisco Unified Communications Manager Release 6.1(3x) or Release 7.0(2x).
Upgrading to Unified CM 6.1(3) From Unified CM 4.x and 5.x
If you are upgrading from 4.1.3, 4.2.3, 4.3(2), 5.1.2, or 5.1.3, use the Product Upgrade Tool (PUT) or the PUT for registered customers only to obtain a media kit and license or purchase the upgrade from Cisco Sales.
To use the PUT, you must enter your Cisco contract number (Smartnet, SASU, or ESW) and request the CD/CD set. If you do not have a contract for Cisco Unified Communications Manager, you must purchase the upgrade from Cisco Sales.
From these 6.1(3) Release notes;
Release Notes for Cisco Unified Communications Manager Release 7.0(2)
Product Upgrade Tool
As far as Licensing goes, yes, any upgrade to a new "train" requires the Software Feature License. So for example;
CUCM 6.0(x) to 6.1(x) = No
CUCM 6.1(x) to 7.0(x) = Yes
Hope this helps!