Direct Routing
Direct Routing is a Microsoft Teams telephony feature that enables organizations to connect their on-premises Session Initiation Protocol (SIP) trunks or third-party telephony carriers directly to Microsoft Teams for voice calling. It allows users to make and receive external phone calls through Teams without requiring a full Microsoft Calling Plan, providing flexibility in carrier choice and integration with existing telephony infrastructure. This solution is part of Microsoft's Phone System and supports features like call routing, voicemail, and emergency services.
Developers should learn Direct Routing when building or integrating telephony solutions for Microsoft Teams environments, especially in organizations with existing SIP trunk investments or specific carrier requirements. It is crucial for scenarios requiring hybrid telephony setups, cost optimization by leveraging third-party carriers, or compliance with regional telephony regulations that Microsoft Calling Plans might not cover. Knowledge of Direct Routing is also valuable for implementing advanced call routing logic, integrating with on-premises systems like PBX, or developing custom telephony applications using Microsoft Graph APIs.