Patent ID: 7609818

Claim:
A method comprising: detecting, at a first monitoring system in a first network portion, that a first telephone call-related signaling message originating from the first network portion is directed to a second network portion via an intermediate network, the first telephone call-related signaling message containing first telephone call-related signaling information; storing at least a portion of said first telephone call-related signaling information in a data store associated with the first monitoring system; sending a notification message from the first monitoring system to a second monitoring system in said second network portion using said intermediate network, said notification message indicating that the first telephone call-related signaling message is being communicated to said second network portion; sending said first telephone call-related signaling message to said second network portion through said intermediate network; receiving said notification message at said second monitoring system; receiving at said second network portion from said intermediate network a second telephone call-related signaling message corresponding to the first telephone call-related signaling message, the second telephone call-related signaling message containing second telephone call-related signaling information; and in response to said received notification message, storing at least a portion of said second telephone call-related signaling information in a data store associated with the second monitoring system.