Phone working upstairs but not downstairs comes up with a X won't even ring downstairs
are you on digital voice? if so is the phone upstairs connect to the socket on back of hub and phone downstairs connected to an adapter? if so try an old style filter in connection downstairs as that is known to assist ringing
Phone downstairs is connected to the hub and the phone upstairs is connected to a connector we have had no problems but now its got a X mark on the downstairs phone