call waiting
US /ˈkɑːl ˌweɪ.tɪŋ/
UK /ˈkɑːl ˌweɪ.tɪŋ/

1.
呼叫等待, 来电等待
a telephone service that alerts a subscriber to an incoming call while another call is in progress
:
•
I missed your call because I don't have call waiting.
我错过了你的电话,因为我没有呼叫等待。
•
You can activate call waiting through your phone settings.
您可以通过手机设置激活呼叫等待。