Verizon Services Corporation

Christine Huff

Robert D Farris

Barry Paul Pershan

Michael G Pilkerton

Raymond F Albers

Charles H Eppert, Iii

Daniel C Michaelis

Dale Lee Bartholomew

Thomas A Nolting

Jay C Lodsun

Walter Pomykacz

In a public switched telephone network, interoffice call attempts to or from a line under surveillance generate a variety of query, response and release messages between the offices, as part of the normal procedures for setting up and tearing down the calls to and from the line. To insure that all calls under surveillance generate signaling messages, terminating, dialing and release triggers are set with respect to the target's line. As a result, the end office serving that line sends queries to a database on the signing network, receives response messages, and sends release report messages. A site processor compiles data from the signaling messages and forms a call detail record (CDR) for each call attempt relating to the target under surveillance. A central file server further processes the CDRs and supplies composite data regarding the target's calls through a data network connection to one or more law enforcement agencies.

Monitor network with advanced intelligent network (AIN) for electronic surveillance

A lawfully authorized electronic surveillance operation requires reporting of detailed call data for a variety of calls associated with the subject of the surveillance. For at least some specified calls to or from the subject, the invention provides profile data in a switching office serving the subject that causes the office to generate accounting messages for each call, essentially in the same manner as for billing, regardless of whether the calls are billable. Accounting records formed from the messages are uploaded to a server system, for processing and formatting as necessary for delivery to the law enforcement agency. The surveillance could entirely rely on these accounting records for the data reporting. In the preferred embodiments, however, the surveillance also involves monitoring of common channel signaling messages to accumulate call detail records for surveillance purposes, with respect to many calls associated with the subject. The preferred embodiment utilizes a special CLASS code set against the subject's profile in the serving end office. The CLASS code in the profile causes that office to produce the accounting messages for each of the subject's calls processed through the office that does not involve a monitored form of interoffice signaling.

Call detail reporting for lawful surveillance

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Vienna, VA, United States of America

Christine Huff