| 摘要 |
<p>A method to detect a defective or missing filter at a customer's side between a first connection having a first frequency spectrum and a second connection having a second frequency spectrum and using the same physical transmission medium as the first connection between said customer and a central office equipment (DSLAM), comprises the steps of
- generating and transmitting at least one first type signal within said first frequency spectrum
- simultaneously performing quality measurements on said second connection in said second frequency spectrum,
- analyzing said quality measurements for thereby concluding the presence or not of the correct functionality and presence of said filter. An apparatus for performing the method is as well disclosed.</p> |
