Trifecta Teams is a platform to manage Microsoft Teams Direct Routing and it's telephony settings. Microsoft has ways to manage it's existing calling plans and phone system, but they do not provide the same tools and features for Direct Routing.
The Trifecta Teams platform works out all of the difficult programming and complicated Microsoft back end to provide you the tools to easily manage and monitor your Microsoft Phone system functionality.
We personally find that Direct Routing is more affordable and gives you a better return value on your phone system. All you need to get started is your Microsoft Login credentials and the appropriate permissions.