Method for the transmission of data between two stations by...

Details Method for the transmission of data between two stations by... Method for the transmission of data between two stations by...

H - Electricity

04

L

325/1

H04L 25/49 (2006.01) H04B 10/12 (2006.01)

Patent

CA 1314937

912-008-3-1 ABSTRACT OF THE DISCLOSURE In a system wherein a main channel of data is transmitted between two stations by means of an optical waveguide, an additional optical channel may be transmitted. Bits of the additional optical channel are inserted into the main channel at a transcoder in the transmitting station in place of bits of the main channel at defined spacings, known to the transcoder of the receiving station, with a bit rate lower than that of the main channel. The inserted bits are removed from the optical main channel at the receiving station. The bits of the additional optical channel inserted into the main channel are double bits that are identical to a forbidden bit combination that results during the recoding of an electrical AMI code into an optical CMI code. In the receiving station, the double bits of the main channel replaced by the bits of the additional optical channel are recovered by using sequential logic and memory to apply the fixed rules of the electrical AMI code.

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