Isolating Call Manager during upgrade

[alialjamri2008]

I am looking for way to upgrade our CUCM 7.1.3 to 8.6.2 but offline i.e. isolating PUB/SUB from the phones during the upgrade process and without diconnecting them from network.

Thanks,

Ali

[Leonardo Santana]

Hello,

Take a look on this guide it might help you!

https://supportforums.cisco.com/docs/DOC-26812

Regards

Leonardo Santana

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