telephone dialogue; phone conversation
A somewhat formal or technical term for a conversation held over the telephone. In everyday speech, 電話での会話 or simply 電話 is more common.
Analyze recordings of telephone dialogues.
We offer counseling via telephone dialogue.
会話 means 'conversation' in general. 電話対話 narrows it to a conversation specifically over the phone.
Compound of 電話 (telephone) and 対話 (dialogue, conversation).