Crosstalk reduction method and repeater

A repeater, comprising:

• an input-side connector and an output-side connector each comprising eight pins used such that pins 1 and 2, 3 and 6, 4 and 5, and 7 and 8 are respectively paired to transmit differential signals;
• and
• a signal transmission unit comprising first to eighth main transmission paths each connecting the pins having a same number at the input-side connector and the output-side connector,
• wherein a communication cable connected to the input-side connector is connected through the repeater to another communication cable connected to the output-side connector, and
• wherein the signal transmission unit further comprises a first coupling transmission path adapted to electrically couple the third main transmission path to the fifth and seventh main transmission paths that are located adjacent to the sixth main path, and a second coupling transmission path adapted to electrically couple the sixth main transmission path to the second and fourth main transmission paths that are located adjacent to the third main transmission path.