A hybrid coaxial cable network employing interdiction to ensure privacy in telephony communications. The video and telephony signals are secured such that telephony and interactive video signals to and from a subscriber do not appear on the network at any other undesired subscriber location....http://www.google.es/patents/US5559858?utm_source=gb-gplus-sharePatente US5559858 - Method and apparatus for delivering secured telephony service in a hydrid coaxial cable network
Method and apparatus for delivering secured telephony service in a hydrid ...
