VoIP (Voice over Internet Protocol) lets you make calls using your internet connection instead of traditional phone

https://gregoryizio057.zenbloomer.com/posts/voip-auto-provisioning-simplifying-phone-deployment-in-teamsites-2.0-no-removed-2

VoIP (Voice over Internet Protocol) lets you make calls using your internet connection instead of traditional phone lines, often reducing costs for businesses and families.