Abstract: The invention described herein is a traffic measurement device, particularly applicable to telecommunication networks. The device is of the digital type and relies on state transitions caused by the origination and termination of calls. This type of measurement is not vulnerable to inaccuracies of traditional measuring systems, particularly those using scanning methods.The device requires, theoretically, only three measuring leads common to all servers in the group under consideration, irrespective of the number of servers; one lead transmits a pulse at the time of seizure of a server, the other transmits a pulse at the time of release of a server, and the third transmits a pulse when all servers are busy. The last pulse is used for system initialization and for measurement of congestion.The basic device integrates the server occupancy states over time by adding the number of scored busy servers in each state a number of times proportional to the duration of the state.

Abstract: The invention described is an electronic device for traffic measurement in telecommunication networks. The device measures the two main parameters of the carried load, known mathematically as the mean and variance of the number of calls in progress from which the mean of the offered load and its peakedness are calculated by mathematical formulas. The device monitors continuously the service channels and records the highest load in a period of sixty consecutive minutes or part thereof. The device also records the number of times when all the service channels are busy or when a certain threshold is reached and provides the facility to record the load during individual group busy hour as well as during the cluster busy hour. (A cluster is defined as a number of cooperating trunk groups with coincident or noncoincident busy hours.