Microsoft Calling Plans

In this scenario, MS Teams routes PSTN calls over Microsoft's PSTN network. This uses Microsoft’s price plans for national and international calls.

Avaya Calling

In this scenario, the Avaya Calling plug-in links the MS Teams user's MS Teams and Avaya Workplace Client clients. This routes their PSTN calls through the IP Office. They can also call other IP Office users. For details, refer to the separate Deploying Avaya Calling for MS Teams with IP Office manual.

Direct Routing

In this scenario, MS Teams routes user PSTN calls through an ASBCE to the IP Office. They can also call other IP Office users.

Operator Connect

This option is like Direct Routing. However, all administration and services use the infrastructure of a PSTN provider who is part of the Microsoft Operator Connect program.