There is no requirement that the Pub/Sub MCS servers be identical. As long as they support the version of CCM that you are building you should be good to go! The consideration that comes into play here is when thinking of "failover" scenarios. You don't want a server that only supports x number of phones to be less than what you need in case of failover.
You are most correct here, the CCM versions must be exact :) A 4.1.3 Publisher CCM will not work with a different Subscriber version (like 5.x or vice-versa). I'm sorry I misunderstood your original question.
Well this is possible. Take for example what would occur if you were to perform an upgrade on a cluster?
Essentially, you would perform the upgrade on one of the members of the cluster first before moving onto the next. After this initial upgrade - you will have a cluster running disparate versions of CCM. Of course leaving this as-is will not be recommended. So as you know the best practice is to have all members of the cluster using the exact same version of code including any patch updates.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...