US 6,553,025 B1 · Multiple routing and automatic network detection of a monitored call from an intercepted targeted IP phone to multiple monitoring locations

Abstract

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.

Claims9

Dependent claims

A surveillance and monitoring system providing monitoring of IP voice calls at a plurality of monitoring stations at different locations connected to networks of different transmission technologies, comprising:

an IP Address Mapping Check Point (IP-AMCP) for translating address formats allowing different protocols of different networks to interoperate and for intercepting voice packets from a designated target IP phone number;
an IP Phone Intercept List (IP-PIL) database connected to the IP-AMCP and including a phone Directory Number (DN) of a phone to be monitored;
a first monitoring station connected to a first technology network and connected through the first technology network for transmitting a surveillance request to the IP-AMCP via the IP-PIL;
a second monitoring station connected through a second technology network to the IP-AMCP and the IP-PIL;
a target IP telephone whose traffic is to be monitored connected to the IP-PIL and the IP-AMCP;
and
the local number portability (LNP) database for providing DNs of monitoring stations for connecting a monitoring station to the designated IP phone number in response to duplicated call packets of the targeted monitored IP phone number.

4 more elements

Dependencies are inferred from the claim text.

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

Life of this patent

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

Life of this patent

Abstract

Claims9