text: Following the successful conclusion of the multi-year project to migrate over 13,000 Bell Centrex telephone lines to a cloud-hosted VoIP solution, this pilot project will test the viability of bringing plain old telephone Public Switched Telephone Network (PSTN) calling (aka making and receiving phone calls) into MS Teams. The main advantage for users is that they would be able to use a single application (Teams) for online collaboration and telephone calls rather than having to use both Teams and the Communicator VoIP client.