Abstract: A system and method of estimating wideband performance characteristics of a telecommunications subscriber loop by identifying and inventorying broadband inhibitors that are present in the subscriber loop. The method begins by inventorying a client computer and associated components. Then, a voice band modem call from a modem associated with the client computer is placed to a remote access server (RAS) under the control of a server computer. Next, once the connection is established between the client computer and the RAS, the RAS extracts modem training and line probing signals received from the client computer modem. In addition, the client computer transmits its inventory of components to the RAS. The RAS then analyzes the received signals and component inventory to identify and inventory potential wide band inhibitors that are present in the subscriber loop being analyzed.

Abstract: A system and method of estimating wideband performance characteristics of a telecommunications subscriber loop by identifying and inventorying broadband inhibitors that are present in the subscriber loop. The method begins by inventorying a client computer and associated components. Then, a voice band modem call from a modem associated with the client computer is placed to a remote access server (RAS) under the control of a server computer. Next, once the connection is established between the client computer and the RAS, the RAS extracts modem training and line probing signals received from the client computer modem. In addition, the client computer transmits its inventory of components to the RAS. The RAS then analyzes the received signals and component inventory to identify and inventory potential wide band inhibitors that are present in the subscriber loop being analyzed.

Abstract: A digital voice switch for detecting voice PCM samples in the presence of noise samples is disclosed. The switch includes a digital variable threshold generating means which adapts the threshold level to changes in the noise level. Advantage is taken of the fact that, over a given interval of time T, speech will occur as random talk spurts separated by periods of silence, while noise (Gaussian distributed) will be continuous. This difference between speech and noise makes it possible to detect the noise level with respect to the voice switch threshold level.