Zero Downtime Upgrades - An upgrade approach to avoid late nights

Let’s see, it has been a while since the last time you heard from me, but this time I will spare you the excuse! What is a Zero Downtime Upgrade? This is an upgrade where no matter from which version of VOS (CUCM, UNITY, and UCCX) you are coming from can be done with very little or zero downtime The Reasoning behind Look I have always worked with companies that like their stuff done quickly, efficiently and with minimal downtime. I’m also very lazy, or very practical, so if I don’t have to spend all night doing an upgrade, I simply don’t do it. Now, like everything else, there are a lot of exceptions to the scenario I will be going over on this Post, so keep reading!