Microsoft Teams is a cloud-based team collaboration software comprising the Microsoft 365 and Office 365 suites of applications. Microsoft Teams Voice includes communication features like calling, secure business messaging, video meetings, and file sharing.
Teams Phone works with Teams clients and certified devices. Teams Phone 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 Teams Phone, and never go to the Public Switched Telephone Network (PSTN)--thereby removing long-distance costs on internal calls.
Visit Microsoft Teams Phone Youtube page.