call waiting
Call waiting is a telephone feature that alerts a user to an incoming call while they are already on another call. When a second call comes in, the user hears a beep or tone, indicating that someone is trying to reach them. They can choose to either answer the new call or continue with the current conversation.
If the user decides to answer the incoming call, the first call is placed on hold. This allows them to switch between calls, making it easier to manage multiple conversations without missing important calls.