Video transmission and control system utilizing internal telephone lines

  • US 6,236,718 B1
  • Filed: 04/16/1999
  • Issued: 05/22/2001
  • Est. Priority Date: 07/14/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a telephone system in which a two-wire telephone network carries telephone voice signals in a telephone voice band between a first telephone equipment and a second telephone equipment coupled to the telephone network, a method for bi-directional communication in a high frequency band of frequencies above the telephone voice band of information between a first transceiver and a second transceiver coupled to the two-wire telephone network comprising:

  • accepting a first signal at the first transceiver;

    transmitting a first transmitted signal that encodes control information in the first signal from the first transceiver to the second transceiver over the two-wire telephone network in a first range of frequencies in the high frequency band;

    receiving the first transmitted signal at the second transceiver;

    providing the control information to a source of information;

    accepting at the second transceiver a second signal from the source of information;

    transmitting a second transmitted signal that encodes information in the second signal from the second transceiver to the first transceiver over the two-wire telephone network in a second range of frequencies in the high frequency band;

    preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network, including preventing transmission of the second transmitted signal to the second telephone equipment;

    receiving the second transmitted signal at the first transceiver; and

    providing information in the second signal from the first transceiver to a destination of information;

    wherein the first range of frequencies is smaller than the second range of frequencies.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×