Digital signal processor-based telephone test set analyzing and displaying multiple signal parameter data for terminal mode and line monitor mode operation

Abstract From the Canadian patent

A digital signal processor-based test set is programmed to enable a craftsperson to monitor, receive and process signals of a variety of formats that may, be present on a line under test including user feature analog modem signals. Such, feature signals may include caller-identification signals visual message , waiting, indicator signals and analog display services interface signals. The test set employs, a signal processing routine that operates in two modes: 1- terminal mode - in which, the test set functions in the place of customer premises equipment (CPE); and 2- line, monitor mode - in which the test set is connected to the line under test and monitors, data signals being …