Patent ID: 7420964

Claim:
A telecommunications system which comprises an office network, an operator network, and a local area network between them, wherein the office network comprises: at least one mobile station configured to support a packet data protocol of the office network, a location database for registering mobile stations belonging to the office network and for managing location and subscriber information, a base transceiver station, a radio access gateway configured to control the base transceiver station and having a functional connection with the local area network and to configure data transmission protocols between said at least one mobile station and the local area network, a serving support node which is configured to support a packet data protocol of said at least one mobile station and to have a functional connection with said radio access gateway, a packet control unit which is configured to support the packet data protocol of said at least one mobile station and to have a functional connection with said radio access gateway and serving support node, and a gateway support node which is configured to support the packet data protocol of said at least one mobile station and to have a functional connection with said radio access gateway, serving support node, and packet control unit, and wherein the operator network comprises functions for configuring data transmissions from the office network through the local area network at least to the data transmission protocol according to said mobile station and used by a public land mobile network and for configuring a packet data connection from the office network through the local area network to at least the packet data protocol used by the public land mobile network; and in response to the packet data connection request made by a mobile station, the office network is configured alternatively to: establish a packet data connection to the destination address defined by the link request through the serving support node and gateway support node of the office network in response to the fact that said mobile station is registered to the office network, or route the packet data connection to the public land mobile network for onward routing to the destination address in response to the fact that the mobile station is not registered to the office network.