Duplex transmission of voice streams between mobile phone call applications and IM/VoIP service clients installed on smartphones is carried out by connecting audio outputs to audio inputs of smartphone audio interfaces. These voice communication applications can be installed on the same smartphone, on two different smartphones, or on one smartphone and one computer of any type. The inventive method contains connections both between the same type and between different wired and wireless audio interfaces of smartphones. As a consequence of the application of the technical result of the method for duplex transmission of voice streams, an invention is claimed for methods for implementing PBX with various types of routing, and a VoIP-Cell gateway for broadcasting voice traffic between a mobile phone client and a VoIP client running IP-PBX.

To enable provision of various extension services to a terminal apparatus connected to an external exchange. A first gateway (12) registers an extension number of a terminal apparatus (30) to an extension control means (11). A flow control means (13) routes an outgoing call originated from the terminal apparatus (30) and an outgoing call addressed to the terminal apparatus (30) between the first gateway (12) and a second gateway (14). When receiving the outgoing call originated from the terminal apparatus (30) from the first gateway (12), the extension control means (11) processes the outgoing call as an outgoing call from the extension number of the terminal apparatus (30). In addition, when an outgoing call addressed to the extension number of the terminal apparatus (30) is made, the extension control means (11) transmits the outgoing call addressed to the terminal apparatus (30) to the first gateway (12).

Duplex transmission of voice streams between mobile phone call applications and IM/VoIP service clients installed on smartphones is carried out by connecting audio outputs to audio inputs of smartphone audio interfaces. These voice communication applications can be installed on the same smartphone, on two different smartphones, or on one smartphone and one computer of any type. The inventive method contains connections both between the same type and between different wired and wireless audio interfaces of smartphones. As a consequence of the application of the technical result of the method for duplex transmission of voice streams, an invention is claimed for methods for implementing PBX with various types of routing, and a VoIP-Cell gateway for broadcasting voice traffic between a mobile phone client and a VoIP client running IP-PBX.

A method of operating a network server, such as a mobile application gateway, connect devices on a cellular or carrier network with individual networks, such as enterprise voice and data networks or residential networks. The effects of the present invention are far reaching in terms of transferring effective call control from the cellular network into the control of the individual network, such as the enterprise, and enabling new business models for the purchase of cellular service from a public cellular carrier by an enterprise.

Pre-authorized communication services and/or transactions are provided via a plurality of networks in response to a request received from a user to provide at least one of a communication service, a transaction and user account information via a plurality of networks of different types. Prior to processing the request, there is verification of the user's authorization to receive the at least one of the communication service, the transaction, and the user account information, and that an account associated with the user has a sufficient amount currently available for payment of the at least one of the communication service and the transaction. After verification, an authorized account associated with the user is charged in real time as the at least one of the communication service and the transaction is provided.

A process and apparatus to facilitate communication between callers and callees in a system comprising a plurality of nodes with which callers and callees are associated is disclosed. In response to initiation of a call by a calling subscriber, a caller identifier and a callee identifier are received. Call classification criteria associated with the caller identifier are used to classify the call as a public network call or a private network call. A routing message identifying an address, on the private network, associated with the callee is produced when the call is classified as a private network call and a routing message identifying a gateway to the public network is produced when the call is classified as a public network call.

A mobile application gateway for connecting devices on a cellular network with individual networks, such as enterprise voice and data networks and/or residential networks. The effects of the present invention are far reaching in terms of transferring effective call control from the cellular network into the control of the individual network such as the enterprise, and enabling new business models for the purchase of cellular service from a public cellular carrier by an enterprise. The invention may consist of a primarily of core network and services components based on the IMS network architecture, and is backward compatible to support legacy systems in place in current telecom and data networks.

A mobile application gateway configured to interconnect mobile communication devices on a cellular network with an enterprise network is provided. The mobile application gateway includes a voice and data signaling gateway configured to provide routing functionalities, service functionalities and admission control. A gateway GPRS support node (GGSN) is configured to establish a secure data session between one or more of the mobile communication devices and the enterprise network by establishing a GPRS tunneling protocol (GTP) tunnel between a carrier-hosted serving GPRS support node (SGSN) and the GGSN.

Pre-authorized communication services and/or transactions are provided via a plurality of networks in response to a request received from a user to provide at least one of a communication service, a transaction and user account information via a plurality of networks of different types. Prior to processing the request, there is verification of the users authorization to receive the at least one of the communication service, the transaction, and the user account information, and that an account associated with the user has a sufficient amount currently available for payment of the at least one of the communication service and the transaction. After verification, an authorized account associated with the user is charged in real time as the at least one of the communication service and the transaction is provided.

A mobile application gateway configured to interconnect mobile communication devices on a cellular network with an enterprise network is provided. The mobile application gateway includes a voice and data signaling gateway configured to provide routing functionalities, service functionalities and admission control. A gateway GPRS support node (GGSN) is configured to establish a secure data session between one or more of the mobile communication devices and the enterprise network by establishing a GPRS tunneling protocol (GTP) tunnel between a carrier-hosted serving GPRS support node (SGSN) and the GGSN.