to have a meeting in which people in different places talk to each other using telephones or video equipment 召开电话[电视]会议
—teleconferencing noun [uncountableU]
From Longman Business Dictionary
teleconferenceteleconferenceTELECOMMUNICATIONS
a meeting in which people in different places can talk to each other using videos or computers, so that each person can see and speak to all the others
I have arranged a teleconference with the export sales team.
—teleconferencing noun [uncountableU]
We are increasingly making use of teleconferencing.