The 9417CW"s Call Director/Fax Switch, combined with Distinctive Ringing service from your service provider, lets you know if the incoming call is business, personal, or a fax - and routes the call for you. With a Conference key to link the two lines, three-way calls are fast and simple. In addition to two lines, the 9417CW has a large three-line backlit display so you can easily see who"s calling, even at night. If you"re on another call, Call Waiting Display gives you the information you need to decide which call is more important - the one you"re on, or the one that"s waiting.