Patent ID: 6496483
Filing Date: 2002-12-17
Classification: H04L,H04M

Abstract:
A method of secure surveillance of a target IP telephone from a plurality of monitoring stations; comprising the steps of:initiating a request for surveillance of a target IP telephone from one of a plurality of surveillance stations each of which may be serviced by a network of different technology from those of other surveillance stations; generating a plurality of duplicate calls to each of the plurality of monitoring stations in response to the initiating a request; authenticating each of the monitoring stations seeking to join in the surveillance by entry of a password for each monitoring station; muting the duplicate calls from any of the monitoring stations not having achieved authentication; and formatting intercepted messages of the monitored target IP phone for conforming to delivery over networks having a different technology than that of the target IP telephone by: establishing a database of monitoring stations and a technology of their connecting networks at a central monitoring center associated with the IP network of the target IP telephone.