Extended Information

The main function of a DSL filter is to effectively separate the low-frequency audio signal (such as the traditional telephone voice signal, with a frequency range of 300 Hz to 3400 Hz) and the high-frequency digital modulation signal (such as the DSL signal, with a frequency range of 20 kHz to 4.4 MHz or higher) on the same line. This ensures that the two signals do not interfere with each other when transmitted over the same telephone line. As a result, users can maintain normal telephone communication while using broadband Internet services. A DSL filter is a key device in xDSL broadband communication systems. It is usually composed of multi-order filter circuits, which consist of passive components such as inductors, capacitors, and resistors. The main technical indicators include POTS Insertion Loss, POTS Return Loss, Group Delay Distortion, Unbalance about Earth, and Attenuation.