三さん者しゃ通つう話わ機き能のう

noun

three-way calling feature

A telephone or communication system feature that allows three parties to talk simultaneously. Domain-specific computing/telecom term.

• この電でん話わ機きには三さん者しゃ通つう話わ機き能のうが付ついています。

  This phone has a three-way calling feature.