Good morning all,
I will be performing a Call Manager upgrade from version 4.1.3 to version 4.2.3 this Sunday. Are there any caveats I need to know of before getting into this? I have to upgrade the OS to 2000.4.2 in order to upgrade the CCM application. I have read the version upgrade takes approximately 30-40 minutes per server. I have not seen a time estimate on the OS upgrade. Has anyone done this, and can they report the results? We are doing this so we can run FoIP through our Call Manager with an H.323 gateway.