Customer has 3 different DIDs that need to ring one phone. What is the best way to set this up so that they can visibly see what line is ringing when called and be able to get more than one call for each one as well? I was told if you just made them ring only, it would never hunt to voicemail if, say, two calls were actvie at same time and 3rd one came through. Is there a way to set it up to have one DID appearance of each and have it jump to the intercom path when answered, so that another call on that DID can ring through? Thanks!