Microsoft Teams Direct Routing

  • Required to connect Teams users to the PSTN
  • Employs SIP Trunking to network operators
  • Needs a certified Session Border Controller

What is it?

Employing SIP trunking, Direct Routing (DR) allows interconnection of the PSTN with the Microsoft cloud-based phone system, facilitating calls between Teams users and mobile or fixed line telephone subscribers anywhere in the world. This is achieved by providing standardized interoperability between customer premise-based PBX equipment, operator telephony application servers and their IMS core.


How do we help?

Complex configuration and inherent interworking issues can cause implementation challenges and security risks when connecting Microsoft Teams with a service provider's PSTN network. Microsoft certified for direct routing from the Teams phone system, our Perimeta Session Border Controller (SBC) eliminates these issues, providing a robust, scalable and flexible solution for deploying SIP trunking.


When to contact us.

Many enterprises are turning to Microsoft Teams for unified communications and collaboration between their employees. If you or your business customers are looking to extend the Teams experience to include inbound and outbound dialing between the Microsoft phone system and fixed line numbers or mobile devices, you need the Perimeta SBC. Check it out in the Azure Marketplace or drop us a line to learn more.


Perimeta SBC

Our session border controller can be deployed in any compute environment and used to provide security and interworking for carrier, MSP and enterprise VoIP access and interconnect infrastructures. It is also certified for Teams DR.

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Teams DR to PSTN with Perimeta

Teams Direct Routnig to PSTN with Perimeta


Highly Scalable Cloud Deployments

Highly Scalable Cloud Deployments with Perimeta