Advanced intelligent network (AIN) functionality for electronic surveillance

DETAILED DESCRIPTION What is claimed is: 1.
A telecommunications system comprising: a switched telephone network including program controlled switching systems connected by trunks and connected by links to subscriber terminals; a separate control network having packet switching systems connected to said program controlled switching systems and to a central control, said central control having processor and storage devices controlling through said control network routing of communication paths through said switched telephone network; a first subscriber terminal connected to a first of said program controlled switching systems by a first of said links; a second subscriber terminal connected to a second of said program controlled switching systems by a voice and data link; a storage associated with said central control and connected to said second subscriber terminal by a data link; said first program controlled switch having programmed therein triggers actuated by the occurrence of predetermined points in call wherein actuation of at least one of said triggers initiates signaling through said control network to said central control and storage in said storage associated with said central control of data including information regarding connections established through said telephone network between said first subscriber terminal and a third subscriber terminal connected to one of said program controlled switching systems, and wherein at least a part of said information is transmitted from said storage associated with said central control to said second subscriber terminal via said data link connecting said second subscriber terminal and said storage associated with said central control.
2.
A system according to claim 1 wherein said data link between said second subscriber station and said storage associated with said central controller is separate from said separate control network and maintains at least a virtual circuit between said second subscriber station and said storage associated with said central controller