Noise reduction device for port of dsl filter and method thereof

A method for reducing port noises of DSL (Digital Subscriber Line) filters comprising the steps of:

• arranging a plurality of signal transmission line sets between a circuit board connection area and a connection end of a port of a DSL filter and each signal transmission line set having a first signal transmission line and a second signal transmission line corresponding to each other;
• transmitting signals by the first signal transmission line and by the second signal transmission line of each signal transmission line set with a phase difference of 180 degrees;
• and
• crossing a first signal transmission line and a second signal transmission line of a first signal transmission line set so that a first signal transmission of a second signal transmission line set that is initially adjacent to the second signal transmission line of the first signal transmission line set is changed to be adjacent to the first signal transmission line of the first signal transmission line set.

A method for reducing port noises of DSL(Digital Subscriber Line) filters comprising the steps of:

• arranging a plurality of signal transmission line sets at a DSL filter and each signal transmission line set having a first signal transmission line and a second signal transmission line corresponding to each other;
• transmitting signals by the first signal transmission line and by the second signal transmission line of each signal transmission line set with a phase difference of 180 degrees;
• and
• crossing a first signal transmission line and a second signal transmission line of a first signal transmission line set so that a first signal transmission line of a second signal transmission line set that is initially adjacent to the second signal transmission line of the first signal transmission line set is changed to be adjacent to the first signal transmission line of the first signal transmission line set.