Features
- PSTN calling in Microsoft Teams
- No per-user Microsoft Calling Plan fees
- Works with Teams Phone System licenses
- Global number coverage in 70+ countries
- TLS transport with certificate-based SBC peering
How to Connect
Requirements
- Microsoft 365 with Teams Phone System licenses
- A certified Session Border Controller (SBC)
- Public DNS and TLS certificate for SBC domain
- At least one DIDfarm number
Trunk Configuration
When you connect, a SIP trunk is created with these optimized defaults:
Post-Setup Checklist
- SBC shows healthy in Teams Admin Center
- Inbound call rings in Teams client
- Outbound call completes from Teams to PSTN
- Voice routing policy applied to users correctly