Patent ID: 8023479

Claim:
A method for connecting a cellular phone with an enterprise network, comprising: deploying a carrier gateway server in a carrier network that provides cellular telecommunication services to cellular phones; deploying an enterprise gateway server in the enterprise network; coupling the enterprise gateway server with the carrier gateway server; establishing a secure tunnel between the enterprise gateway server and the carrier gateway server via at least one of a gateway general packet radio service support node function of the enterprise network and a home agent function of the enterprise network, wherein the secure tunnel supports selectable security and encryption specific to requirements of the enterprise network; receiving, by the carrier gateway server, an indication that a call is originating or terminating with a first cellular phone associated with the enterprise network; identifying, by the carrier gateway server, the enterprise network; notifying, by the carrier gateway server, the enterprise gateway server of the call; determining, by the enterprise gateway server, a call routing for the call; informing, by the enterprise gateway server, the carrier gateway server of the call routing.