dial tone
US /ˈdaɪəl ˌtoʊn/
UK /ˈdaɪəl ˌtəʊn/
名詞
発信音
a continuous sound heard on a telephone when you pick it up, indicating that you can dial a number
例:
•
I picked up the phone, but there was no dial tone.
電話を取ったが、発信音がしなかった。
•
You need to wait for the dial tone before you can make a call.
電話をかける前に発信音を待つ必要があります。