명사
The sound transmitted back to a caller to indicate that the telephone they are calling is ringing.
용법- 불가산
A telephone feature allowing a person to receive an automatic call back when a busy line becomes free.
용법- 불가산
- 예문
-
'But you've been engaged an awfully long time: I had to use ringback in the end and that's expensive, but this is important so never mind.'