In a previous blog post a technical deep dive on deploying enterprise voice on Microsoft Teams was provided. In this post, we supplement and complete the discussion holistically by providing configuration guidance of a certified Session Border Controller (SBC) for Direct Routing. In this lab, we leverage the same tenant with Office365 E5 licenses and deploy a Ribbon (formerly Sonus) SBC1000 along with a PSTN SIP Trunk from Masergy including DID numbers. Detailed configuration screen shots of the SBC will be provided along with explanatory notes. Special thanks to DMUnified for assistance with the SBC!