I recently moved and need a wireless phone jack for the 722. I also want to use it so I can use a phone in another room without a phone jack. I mistakinly bought the Phonex system which appears to only work with data (not an active phone line). It looks like I need to return the Phonex and buy either the RCA or Philips wireless phone jacks. My local retailer doesn't carry the extensions for the 2nd room. Can I just buy two of the base units (they come with one extension)? Are there better solutions for what I want to accomplish?