Patent ID: 7898945

Claim:
A multimedia transmission system with redundant multiple strain transmission lines for sending or receiving packeted multimedia data that includes sound or video, comprising: an apparatus having send and receive function capabilities for sending and receiving packeted multimedia data to or from an opposition apparatus, the apparatus comprising: a carrier detection device adapted to detect a first carrier signal or a second carrier signal that are related to the packeted multimedia data; a first data control device configured to send or receive the packeted multimedia data to or from the opposition apparatus via a first transmission line of the redundant multiple strain transmission lines, the first data control device configured to send the first carrier signal to the carrier detection device in response to the first data control device receiving data from the opposition apparatus via the first transmission line; a second data control device configured to send or receive the packeted multimedia data to or from the opposition apparatus via a second transmission line of the redundant multiple strain transmission lines, the second data control device configured to send the second carrier signal to the carrier detection device in response to the second data control device receiving data from the opposition apparatus via the second transmission line; a switch device configured to select between the first transmission line and the second transmission line for sending or receiving the packeted multimedia data to or from the opposition apparatus; the switch device configured to select the first transmission line, if the carrier detection device detects the first carrier signal, to allow the first data control device to send or receive the packeted multimedia data to or from the opposition apparatus via the first transmission line; the switch device configured to select the second transmission line, if the carrier detection device detects the second carrier signal, to allow the second data control device to send or receive the packeted multimedia data to or from the opposition apparatus via the second transmission line; wherein the switch device is configured to select the second transmission line, if the first carrier signal is not detected by the carrier detection device in a set time, to allow the second data control device to send or receive the packeted multimedia data to or from the opposition apparatus via the second transmission line; and wherein the switch device is configured to select the first transmission line, if the second carrier signal is not detected by the carrier detection device in the set time, to allow the first data control device to send and/or receive the packeted multimedia data to/from the opposition apparatus via the first transmission line.