conference call; conference calling
Technical term for a phone feature that allows multiple participants to talk simultaneously. Often used in business or telecom contexts.
This phone supports the conference call feature.
The meeting was held via conference call.
電話会議 is a more general term for a telephone conference, while 多者通話 specifically refers to the technical feature of a multi-party call.
Compound of 多 (many), 者 (person), and 通話 (telephone call). A straightforward modern technical term.