
When you are on a call, you can receive a second call. When the second call comes in, you hear a call-waiting tone and see the popup.
If there is an incoming call during a conversation, press the Talk key to put the first call on hold and answer the incoming call.
Press the Talk key to switch between calls.
Press the End key to end the currently active call.
Press the Talk key to unhold the other line.
Press the End key to end the call.
Press the End key to exit.