You must subscribe through your local telephone company to receive Call Waiting Service.
Flash and Call Waiting
If you have Call Waiting service and a call waiting tone sounds while you are on a call, press talk/flash (or flash on the base) to accept the waiting call. There is a short pause, then you will hear the new caller. To return to the original caller, press talk/flash or flash on the base again.
Voice Mail LED
The voice mail LED on the handset is designed to work with your voice mail service provided by your local telephone company. The LED flashes when you have new messages in your voice mail box.
You may need to occasionally reset the indicator if it remains On after you’ve retrieved your messages. To reset the indicator, when the phone is in the standby mode, press and hold find handset on the base until the paging sound stops (about 5 seconds).