Stealth interception of calls within a VoIP network

Abstract

Stealth interception of calls within a VoIP Network (91) for providing law enforcement related call interception capability (60,61,62). The VoIP network comprises of basically a SoftSwitch (20) that offers IP based telephony services for subscribers (10, 11) over a packet network. Packet Interceptors (51) are deployed in a packet network to non-intrusively monitor the signaling (21) and media packets (22), which comprise a call in a VoIP Network. The Call Monitoring Engine (50) on receipt of an intercept request from the Law Enforcement Agency (40); notifies the packet interceptors to monitor for packets and the Voice Packet Receiver and Assembler (52) for reception of voice packets. On detection of relevant packets the interceptors inform the Call Monitoring Engine of signaling packets and the Voice Packet Receiver and Assembler of voice packets. This packet information is processed and transmitted (41,42) to the Law Enforcement Agency.

Dependencies are inferred from the claim text.