Currently my house is wired with a master filter with an unfiltered feed going to a specific jackpoint where my ADSL router is plugged into. The Genius router will replace it. The filtered feed goes to the rest of the house (5 or so jackpoints). It would seem obvious to me that if I take out the filtered connection then effectively the wiring in the rest of the house is now isolated from the outside line but otherwise intact. Why cant I connect it to the 'phone' (green) jack on the Genius box and therefore be able to continue to use the existing phones?
I am also wondering why a fax wont work. I occasionally want to send a fax (ie never receive one - dont have a fax number). IIRC the Genius emulates a PSTN so surely this should be possible (but maybe not supported)?