Multiple services system using telephone local loop
Programming-on-demand cable system and method
Combined narrow band and broad band telephone communication system
Impulse pay per view system and method
Telephone access display system
Dial-up telephone network equipment for requesting an identified selection
Digital interactive communication system
Direct telephone dial ordering service
ApplicationNo. 766535 filed on 09/27/1991
US Classes:725/114, Server or headend379/93.12, Sales, ordering, or banking system725/87, Video-on-demand725/106, Telephony via television distribution network725/118, Transmission network725/131Receiver (e.g., set-top box)
ExaminersPrimary: Chan, Wing F.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04N 007/14
AbstractA public switched telephone network (PSTN) provides digital video signals from a video information provider to one or more of a plurality of subscriber premises. A subscriber uses either a standard telephone instrument over the PSTN or a dedicated control device over an ISDN packet network to order video programming. The request is transmitted to a designated video information provider and digital transmission connectivity is established between the video information provider and the central office serving the subscriber. Connectivity between the central office and subscriber is provided by asymmetrical digital subscriber line interface units over a local loop. The interface units frequency multiplex digital video information with voice information to the subscriber and support transmission of a reverse control channel from the subscriber to the central office for transmission on the ISDN packet data network back to the video information provider. The interfaces also allow base band signalling and audio between the central office and the subscriber for conventional telephone instrument connectivity.