Cisco Technology, Inc.

Gerard Berthet

Mehryar Khalili Garakani

Stephen I Schleimer

John K Ahlstrom

Jochen Weppner

After completion of a voice-over IP call, for example, first information representing a Layer 3 path of a packet flow of a completed call that has passed through a packet-switched network is created. Second information representing a Layer 2 path of a packet flow of the completed call is also created. One or more selected phone call detail records are retrieved, which are associated with the completed call. Thus, the likely path of a troubled call is determined, and phone call detail records associated with key points in the path are located. The first information, second information, and selected phone call detail records are provided to a user for use in evaluating one or more problems experienced in the completed call.

Method and apparatus for determining troubleshooting information for completed calls in a telecommunications network

A method is disclosed for creating and storing troubleshooting information for diagnosing one or more problems experienced in one or more completed voice calls that are carried by a packet-switched data network. After completion of a voice-over IP call, for example, first information representing a Layer 3 path of a packet flow of a completed call that has passed through the data network is created and stored. Second information representing a Layer 2 path of a packet flow of a completed call that has passed through the data network is also created and stored. From a phone call detail record database, one or more selected phone call detail records are retrieved, which are associated with the completed call from a database of phone call detail records for a large plurality of completed calls. Thus, the likely path of a troubled call is determined, and phone call detail records associated with key points in the path are located. The first information, second information, and selected phone call detail records are provided to a user for use in evaluating one or more problems experienced in the completed call. Based on this information, the user can troubleshoot the call and identify responsive action. In one embodiment, IP path segments of the voice over IP flow are identified and media termination points are identified for each path segment. Layer 2 and Layer 3 path tracing is performed for each IP segment of the voice over IP flow.

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Los Gatos, CA, United States of America

Gerard Berthet