Patent ID: 7817567

Claim:
A method comprising: transmitting a respective telephone number from a network troubleshooting center (NTC) to a plurality of network analyzers (NAs) monitoring respectively corresponding communication lines through which Voice over Internet Protocol (VoIP) data streams are transmitted; and after receiving the telephone number, collecting quality of service data by the NAs for data streams associated with a telephone call having the telephone number as a source or destination and transmitted through the communication lines, and providing quality of service information by the NAs to the NTC based on the collected quality of service data; before the step of collecting the quality of service data: after receipt of the telephone number by each NA, monitoring call control information by each NA on the corresponding communication line in accordance with the telephone number to try to identify a data stream associated with a telephone call having the telephone number as a source or destination; transmitting, by a first NA of the NAs to identify the data stream, identifying information of the identified data stream to the NTC; after receipt of the transmitted identifying information, communicating between the NTC and the NAs so that each NA has the identifying information; and sending a message from the NTC to the NAs to cause the NAs to stop trying to identify a data stream associated with the telephone call.