A method and apparatus for analyzing a telecommunications network and isolating failures within the network first receives alarms from various nodes in the network as a result of a failure. The method selects one alarm and then retrieves topology data associated with a trunk that caused the selected...http://www.google.de/patents/US5991264?utm_source=gb-gplus-sharePatent US5991264 - Method and apparatus for isolating network failures by applying alarms to failure spans
