Patent ID: 7873001

Claim:
A system, comprising: a cellular network including a mobile switching network that provides cellular telecommunication services to cellular phones; a carrier gateway server that is communicatively coupled with the mobile switching network; and an enterprise network including an enterprise gateway server that is communicatively coupled with a PBX located in the enterprise network; wherein the enterprise gateway server is communicatively coupled with the carrier gateway server and wherein signaling information only is transmitted between the carrier gateway server and the enterprise gateway server, wherein the carrier gateway server receives an indication from the mobile switching network that a call is originating or terminating for a cellular phone associated with the enterprise network, wherein the carrier gateway server identifies the enterprise network of the associated cellular phone, wherein the carrier gateway server notifies the enterprise gateway server of the call and call information of the originating or the terminating call, wherein the enterprise gateway server stores the call information including an originally intended destination, wherein the enterprise gateway server determines a call routing for the call, wherein the enterprise gateway server informs the carrier gateway server of the call routing, wherein the carrier gateway server orders the mobile switching network to perform the call routing, wherein the mobile switching network routes the call to the enterprise gateway server directly or via the PBX, wherein the enterprise gateway server associates the call with the previously stored call information, and wherein the enterprise gateway server routes the call to a final destination.