Patent ID: 8345670
Filing Date: 2013-01-01
Classification: H04L,H04M,H04W

Abstract:
1. A call control system to route a voice over internet protocol call between a wireless communication device and a destination communication device, wherein the destination communication device is located in a geographic area served by a communication network, the call control system comprising: a communication interface configured to receive an authorization response from an authorization system located in a home wireless network of the wireless communication device, wherein the authorization response includes a destination identifier of the destination communication device and a location identifier of the wireless communication device; a processing system configured to process the destination identifier and the location identifier to determine if the wireless communication device is located in the geographic area served by the communication network; and if the wireless communication device is located in the geographic area served by the communication network, the processing system configured to direct the communication interface to transfer the voice over internet protocol call over a source port associated with the geographic area served by the communication network.