A method and apparatus for enabling a local area network wiring structure to simultaneously carry digital data and analog telephone signals on the same transmission medium. It is particularly applicable to a network in star topology, in which remote data units (e.g. personal computers) are each connected...http://www.google.com/patents/US7447144?utm_source=gb-gplus-sharePatent US7447144 - Telephone communication system and method over local area network wiring
