Phone System enables call control and PBX capabilities in the cloud with Microsoft Teams and Skype for Business Online.
With Phone System, users can use Teams or Skype for Business Online 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 or Skype for Business Online 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 and Skype for Business Online. Phone System administrators can manage calling options and settings from the same console used for messaging, collaboration, and so on.
Calls between users in your organization are handled internally within Phone System, and never go to the Public Switched Telephone Network (PSTN). This applies to calls between users in your organization located in different geographical areas, removing long-distance costs on these internal calls.
For calls outside your organization, Microsoft provides multiple options for connecting Phone System to the Public Switched Telephone Network (PSTN).