When looking to upgrade Cisco Unified Communications Manager, the identification of existing versions and upgrade paths can be a bit blurry.  The existing version of UCCM can be found in a couple spots in the Cisco UCCM (7.1) OS Administration app.

Under Show->Software it looks like this…

Cisco UCCM 7.1(5) – Show->Software

When you go to Cisco’s website, the UCCM upgrade version numbers don’t match exactly what is reflected in the OS Administration app.  The key to decoding where you are, and where you want to go, lies in a document called “Cisco Unified Communications Manager Software Compatibility Matrix”. In the Compatibility Matrix the UCCM Release is tied to a specific System Version. 

The Compatibility Matrix is a very decent and comprehensive source of versioning information for a variety of dimensions.  For an upgrade from 7.1(5) –> 7.1(5b) SU4 the data looks roughly as below.  (excerpts)

Cisco Unified Communications Manager

7.1(5)

System Version
7.1.5.10000-12

Release Date

Apr 19 2010

 

Cisco Unified Communications Manager

7.1(5b)SU4

System Version
7.1.5.33900-10

Release Date

May 2 2011