Patent ID: 7983331
Filing Date: 2011-07-19
Classification: H04M

Abstract:
1. 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, the method comprising: 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; and analyzing said quality measurements to determine the presence or not of correct functionality and presence of said filter, wherein said first connection is a narrowband connection and wherein said second connection is a broadband connection, and the simultaneously performing quality measurements step includes measuring a signal quality of the second connection and determining whether the first type signal caused a disturbance in the signal quality of the second connection based on the signal quality measurements.