Multiple routing and automatic network detection of a monitored call from an intercepted targeted IP phone to multiple monitoring locations

摘要

Monitored calls are intercepted and rerouted to plural selected monitoring stations by intervention of an IP phone monitor center (IPMC) which duplicates the voice to a monitoring location and automatically identifying the types of networks to be traversed and adapting the voice message to such a network type to communication with monitoring stations connected to these networks. Surveillance is, therefor, enabled to be conducted at more than one monitoring location each of which many are widely separated from the other. In a particular embodiment an authorized surveillance agent transmits a valid request to an IP phone monitor center (IPMC) which in response intercepts voice packets to and from the targeted IP phone. The duplicated voice packets are transmitted to the designated monitoring location. The IPMC determines the type of voice signal to be transmitted to the terminal monitoring station. If the monitoring location is serviced by an IP telephony network the monitored traffic is duplicated by the IP-AMCP in IP format to an IP DN as programmed by the IP-PIL. If the monitoring location is serviced by a PSTN network a PSTN check point (PSTN-CP) establishes a trunk connection with the local directory service (LDS) and receives incoming voice packets at the IP-AMCP which the PSTN-CP converts to voice trunk (i.e., T1) to communicate with the LDS.