Patent ID: 8204047
Filing Date: 2012-06-19
Classification: H04L

Abstract:
1. A method comprising: receiving a caller identification (ID) identifying a calling party telephone number in a call initiation message transmitted from an originating Voice over Internet Protocol (VoIP) call agent, the call initiation message being for a VoIP call; determining an identity of the originating VoIP call agent; verifying that a public switched telephone network (PSTN) call to the calling party telephone number would arrive at the originating VoIP call agent having the determined identity, the verifying comprising determining that at least one PSTN call to the calling party telephone number identified by the caller ID arrived at the originating VoIP call agent in response to receipt, from the originating VoIP call agent, of demonstrated knowledge of at least one attribute of the at least one PSTN call that demonstrates knowledge of the at least one PSTN call; and applying, responsive to the call initiation message, one or more rules based at least in part on the verifying step.