Conference call
A conference call was a type of communications transmission that connected several individuals at the same time.

In 2377, after Tuvok suggested that he could mind meld with Seven of Nine and Kathryn Janeway at the same time, thereby enabling them to link with each other via him, The Doctor remarked that he made the process sound like a conference call. ()

See also 
 Subspace teleconference

External link 

Communication