Patent ID: 8494128

Claim:
A method of monitoring performance of a telephone network, said telephone network comprising at least one exchange configured for collecting signaling messages which are received at said at least one exchange and/or which are generated at said at least one exchange, comprising: a) acquiring from said exchange a set of signaling messages indicating unsuccessful call setup procedures relative to calls addressed to a plurality of destinations; b) associating with each signaling message of said set of signaling messages a respective destination information which is indicative of the destination of the unsuccessful call which generated the signaling message, wherein said destination information comprises a number n of most significant digits of a callee telephone number; c) processing said set of signaling messages and the corresponding associated destination information, thus obtaining information relative to said unsuccessful call setup procedures according to call destinations; and d) acquiring configuration information from said at least one exchange, wherein said configuration information comprises said number n, wherein said steps a), b), and c) are periodically performed with a predetermined period, wherein the method further comprises, during a first period, changing said configuration information into modified configuration information based on said information relative to said unsuccessful call setup procedures according to call destinations, and transmitting said modified configuration information to said at least one exchange.