1) Teleconference 
is holding a meeting without being in the same place, using a network connection and tools like Voice over IP, Instant Messaging, Video, and Whiteboards.
A conference established between two or more people or groups of people who are in different locatio
Electronically linked meeting conducted among groups in separate geographic locations.
Interactive communication among people at two or more locations using telecommunication. May involve audio, graphics, computer, or video communication.