1) Conference 2) Group discussion 3) Teleconferencing 1) Teleconferencing 
A teleconference or teleseminar is the live exchange and mass articulation of information among several persons and machines remote from one another but linked by a telecommunications system. Terms such as audio conferencing, telephone conferencing and phone conferencing are also sometimes used to refer to teleconferencing. The telecommunications ...
A conference involving two or more people at different locations, using telecommunications equipment, such as computers, video, telephone, etc
[n] - a conference of people who are in different locations that is made possible by the use of such telecommunications equipment as closed-circuit television
teleconferencing noun a conference of people who are in different locations that is made possible by the use of such telecommunications equipment as closed-circuit television