Patent ID: 6233313
Filing Date: 2001-05-15
Classification: H04L,H04M,H04Q

Abstract:
A method of conducting lawful call associated data surveillance in a switched telecommunication network, comprising the steps of:during processing of a call in some way associated with a subject of the surveillance, detecting a CLASS code in a service subscriber profile for the subject stored in a switching office of the network involved in processing of the call, said code indicative of a surveillance status for the call;in response to detecting the code, generating Automatic Message Accounting (AMA) messages in the switching office, the AMA messages containing data regarding events occurring in processing of the call by the telecommunication network;processing the AMA messages to form a detailed record of the call, the detailed record comprising significant data associated with the call; anddelivering the detailed record of the call to a data system of a law enforcement agency.