We've got an employee that will be at one of two desks at any given time. We need it so either when their DID is dialed, their extension number is dialed or a call is tranferred to their extension, both phones ring at the same time. They also need to be able to pick up the call from either phone by just lifting the handset without having to press any buttons. I've read a little about using a cover button... but wouldn't they have to hit the button to grab the call. Any help is appreciated. Thanks!