Patent ID: 6400707
Filing Date: 2002-06-04
Classification: H04L,H04M

Abstract:
A method of conducting an analog to analog communication between an originating terminal and a terminating terminal through a packet switched network coupled to a switched telephone network via at least one gateway wherein said terminating terminal is coupled to said switched telephone network; comprising:establishing a static filter device between said gateway and said originating terminal; transmitting through said filter device to said gateway a request for the establishment of a communication path through said gateway and through said telephone network to said terminating terminal; engaging in a signaling dialog between said originating terminal and said gateway through said filter device; generating a real time copy of at least a portion of said signaling dialog; creating a filter device control signal containing parameters derived from said dialog; configuring said filter device pursuant to said filter control signal; conducting said analog to analog communication between said originating terminal and said terminating terminal via packet signaling through said packet switched network and said filter device to said gateway; filtering said packet signaling through the configured filter device and blocking packet signals that fail to conform to the configuration of said static filter created from said dialog.