Hi LatitiaS,
I am not sure your reply fully answers my concerns. I note that you say that "one could plug up to two lines into the device (phone, fax machine)." I have two independent phone numbers in my condo for phone and fax. I am glad no rewiring is required but the cable connection is in the living room and the phone jack to activate house lines is in the kitchen at a great distance from where the modem would connect. If not rewired physically are you suggesting a loose wire running into a separate room? Our complex units are all similarly designed.
Again, I currently have the phone, cable, and Internet package. I have two separate phone lines, one for fax and one for voice. The more questions I ask I am left unsure of how this could possibly work!