What is Call Waiting and how do I use it?

Call Waiting alerts you with a special tone to let you know someone else is calling while you are on another call.  Simply press (don't hold down) the telephone receiver button, or flash button and you can answer your second caller.  To return to your first caller, simply press the receiver button, or flash button again.  You can switch between callers as often as you like.  Each conversation is private and cannot be heard by the other caller. You may also choose not to answer the incoming call while on another call.