I'm a little bit confused because of firmware naming, version history and documentation.
A costumer has three CUCM cluster. Of course all clusters have different version like 7.1(5), 8.6 and 9.1(1a). Also the firmware is not the same. Now he wants to have the same firmware version on all clusters. So he asks me to upgrade to minimum firmware version 9.3.1SR2, he used 7962/7942 phones.
In his headquarter cluster in Germany he use the firmware 9.3.1ES14S. If I'm correct that fixes some problem with time zone and so on.
Now my questions:
1.) Was the firmware version 9.3.1ES14S build from 9.3.1SR2? Means is that firmware newer and has all fixes like in version 9.3.1SR2?
2.) If 9.3.1ES14S is the newest version, can I use that firmware for the other clusters 7.1(5) which controls other European locations and for 9.1(1a) the cluster in Asia?
The Firmware 9.3.1ES14S which is working in one of the CUCM cluster would have been provided by Cisco TAC in case of any issues.These are Engineering Special versions which are published by TAC with fixes but not publicly available.
The best way to formalize same Firmware version on all CUCM clusters is to use the latest version.
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