Abstract: A system that incorporates teachings of the present disclosure may include, for example, an echo measurement device having a controller to transmit a test signal in a communication path which is looped back at an end point identified as having an echo problem. The test signal can be transmitted at a remote location from the end point. The test signal can be represented by a limited burst signal of one or more frequencies operating outside a range of an operating frequency of an echo canceller deactivation signal transmitted in the communication path. Additional embodiments are disclosed.

Abstract: A method is described for detecting total end-to-end loss of data packets in a packet network that does not require direct access to the packet network. A test signal is generated at a source end point indirectly coupled to the packet network. The test signal is transmitted over the packet network to a destination end point also indirectly coupled to the packet network. At the destination end point a modified test signal is received and examined to detect irregularities and then processed to determine whether the irregularities in the recorded signal represent packet loss.

Abstract: A method is described for detecting total end-to-end loss of data packets in a packet network that does not require direct access to the packet network. A test signal is generated at a source end point indirectly coupled to the packet network. The test signal is transmitted over the packet network to a destination end point also indirectly coupled to the packet network. At the destination end point a modified test signal is received and examined to detect irregularities and then processed to determine whether the irregularities in the recorded signal represent packet loss.

Abstract: A digital signal processor is provided with the facility to measure accurately, and nonintrusively, the levels of noise and/or speech signals appearing on an in-service network connection.

Abstract: A measurement system and method for a telecommunication systems diagnoses problems within a communication line. The measurements are performed both non-intrusively and intrusively in an interactive manner, and evaluate the transmission quality of the communication line through to the subscriber's telephone set.

Abstract: A method for providing an echo power measurement of a transmission line having an echo path delay wherein a frequency domain adaptive filter is converged using samples collected from the transmission line that have been converted from a time domain to a frequency domain. A regression method is used to estimate the magnitude of taps of the frequency bins of the frequency domain adaptive filter that have been determined to be not accurately converged. In addition, a method and apparatus for measuring the echo path delay of a transmission line wherein a predetermined number of first time domain adaptive filters covering predetermined time periods are converged using samples collected from the transmission line that have been subband filtered to calculate a rough estimate of the echo path delay. Then, a second time domain adaptive filter is converged using the non-filtered samples to calculate a final echo path delay.