What is Microsoft Teams Phone System
Phone System is Microsoft’s technology for enabling call control and Private Branch Exchange (PBX) capabilities in the Microsoft 365 cloud with Microsoft Teams.
Phone System works with Teams clients and certified devices. Phone System allows you to replace your existing PBX system with a set of features directly delivered from Microsoft 365.
Calls between users in your organization are handled internally within Phone System, and never go to the Public Switched Telephone Network (PSTN)–thereby removing long-distance costs on internal calls.
For making external calls, Phone System provides add-on options for connecting to the PSTN.
Phone System features
With Phone System, users can use Teams to place and receive calls, transfer calls, and mute or unmute calls. Phone System users can click a name in their address book, and place Teams calls to that person. To place and receive calls, Phone System users can use their mobile devices, a headset with a laptop or PC, or one of many IP phones that work with Teams.
Phone System administrators can manage calling options and settings from the same console used for messaging, collaboration, and so on.