"Internet telephony" refers to a technology that enables making phone calls over the internet rather than traditional telephone networks.
Typical features of software in the field of internet telephony may include:
Making and receiving calls: The software allows users to make and receive calls over the internet, both to other users of the same software and to traditional landline or mobile phones.
Video calls: Ability to conduct video calls alongside voice calls to enable visual communication.
Call forwarding: Functionality to forward calls to other numbers or users when a user is unavailable or certain conditions are met.
Voicemail: Ability for users to leave voice messages from callers when a call is not answered or when the user is offline.
Conference calling: Functionality to set up and participate in conference calls with multiple participants simultaneously.
Call list and history: Recording and displaying calls in a list, as well as accessing call history for later reference or review.
Contact management: Managing contacts within the software to quickly make calls or send messages.
