noun
telephone telegram; phonogram
A telegram sent or received via telephone, as opposed to traditional telegraphy. This is a technical term from the era when telegrams were common.
昔は電話電報で急ぎの知らせを送ったものだ。
In the old days, people used to send urgent notices by telephone telegram.
Compound of 電話 (telephone) and 電報 (telegram). The term reflects a historical service where telegrams were dictated over the phone.