xDSL 30KHz Noise xDSL Service High Frequency 30KHz equal then bandwidth Noise damage prevention

摘要

PURPOSE: An apparatus for preventing the RF(Radio Frequency) noise damage of an xDSL(x Digital Subscriber Line) service is provided to remove an RF inputted from an AC power line for protecting the human body and minimizing the influence from other devices. CONSTITUTION: A frequency band of a line filter(2) for EMI(Electro-Magnetic Immunity) is used as 30KHz-30MHz bands including an xDSL frequency band for minimizing use conducted emission and conducted susceptibility and providing a high-quality communication service. Inductor and capacitor values are changed and a core is changed for changing 150KHz-30MHz frequency bands to the 30KHz-30MHz frequency bands suitable for an xDSL.