Call Waiting permits callers to get through to you even when you are on the phone with another call. You will hear a beep indicating an incoming call. You will then be able to put your current caller on hold and answer the new call. You can continue to alternate between parties as often as you’d like. It’s like having two lines
How does it work? When you are on a call and the line beeps, simply press the flash button or switch hook. You will be connected with the waiting party and your original party will be placed on hold. Press the flash button or switch hook again, to reconnect to the original party and hold the waiting party. If a third caller tries to reach you they’ll get a busy signal or be forwarded to voice-mail.
Take note of the following DTMF Functions
*70 to Activate, *71 to Deactivate