To connect Direct Routing to the PSTN for voice and emergency, enterprises need:
A Microsoft Teams Phone System license in Microsoft 365. This is typically included in the E5 package, and as an add-on for E3.
A Direct Routing provider with SIP trunks and certified E911 for Microsoft Teams. Bandwidth is one of three certified E911 providers for Microsoft.
A Microsoft-certified Session Border Controller (SBC) to terminate SIP Trunks.
Trained IT personnel that can set up & manage your Microsoft Teams connectivity.
Learn more about getting started with Direct Routing.