Upgrade 5.1.3 to 6.1.2 security question

Unanswered Question
Nov 26th, 2008
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Hi all,


I have a cluster 5.1.3 configured in mixed mode. Already installed cisco token.

Now i need to upgrade to 6.1.2.

Question: Is necessary to upgrade CTL on the phones ?

Is not so clear on the documentation .... i tried in LAB and everything working without upgrade the CTL but i ask to experience from someone.


Thank you again

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