Patent ID: 8005192

Claim:
A signal monitoring device for monitoring a call terminated at a first monitored network location associated with a communication service provider, the signal monitoring device comprising: a first interface to receive signal traffic associated with the call, including a plurality of signaling messages, forwarded from an intermediary network, where each of the received signaling messages corresponds to an original signaling message transmitted to the intermediary network from a second monitored network location associated with the communication service provider; a buffer to temporarily store each of the signaling messages; a second interface to receive, via another network associated with the communication service provider and not via the intermediary network, at least one notification message generated at the second monitored network location, where the at least one notification message corresponds to particular ones of the original signaling messages; an identification module to filter, based on the at least one notification message, the buffered signaling messages and to transfer particular ones of the filtered signaling messages from the buffer; a storage device to store the transferred signaling messages; and a processor to perform an analysis of the stored signaling messages.