RF broadcast system utilizing internal telephone lines

A signal transmission method comprising:

• generating a first digital signal at a first location, and
• converting said first digital signal to an analog signal having substantially the same information content as said first digital signal, and
• transmitting said analog signal onto a twisted-pair telephone wiring network having a junction and at least three twisted-pair lines connected to one another at said junction, said network having a first port connected to a telephone exchange and a second port connected to a telephone device, and receiving said analog signal over said network at a second location substantially spaced from said first location, and converting said received analog signal to a second digital signal having substantially the same information content as said first digital signal, and
• digital processing said second digital signal, and at one of said first location and said second location, presenting a high impedance to signals whose energy is concentrated at frequencies below the highest frequency used for communication by ordinary telephone devices, while allowing said analog signal to transmit substantially unaltered.

A signal transmission system comprising:

• a twisted-pair telephone wiring network having a junction and at least three twisted-pair lines connected to one another at said junction, said network having a first port connected to a telephone exchange and a second port connected to a telephone device;
• signal generating means for generating an analog signal at a first location,
• transmitting means operatively connected to said signal generating means and said wiring network for transmitting said analog signal onto said network;
• receiving means operatively connected to said network for receiving said analog signal over said network at a second location substantially spaced from said first location;
• processing means operatively connected to said second location for operating on said analog signal;
• and
• at one of said first location and said second location, means for presenting a high impedance to signals whose energy is concentrated at frequencies below the highest frequency used for communication by ordinary telephone devices, while allowing said analog signal to transmit substantially unaltered.