What is it?
Microsoft Phone System allows you to replace your on-premises PBX (Private Branch Exchange) system with a set of features that fully integrates with your Microsoft 365 cloud services. Phone System offers you call control and PBX capabilities, with options for connecting to the PTSN (Public Switched Telephone Network) to make and receive voice calls.
How to license it.
Add on licenses are licenses for specific Microsoft Teams features. They allow you the flexibility to add features only for users in your business who need them. Licenses for Microsoft Phone System are available for any business size in any sector.