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VoP: NGN Network Mediation Gateway Framework Generic Requirements

Document Number GR-3062
Issue Number 01
Issue Date May 2001

    ABSTRACT: Issue 1 of GR-3062, VoP: NGN Network Mediation Gateway Framework Generic Requirements, describes the architecture, interfaces, and functionality of the Network Mediation Gateway (NMGW) component of a Next Generation Network (NGN). The NMGW is a functional entity that interfaces with both the Access Network and the NGN Core Network. As such, it controls subscriber access to the NGN, regardless of the access technology used by the subscribers. It can be a stand-alone device or can be incorporated by a manufacturer into the functions of another network element. The functions of the NMGW are varied and may include:

    • Network protection, i.e., user authorization, address masking, toll fraud prevention, admission control, and traffic throttling
    • Aggregation of connections from multiple Customer Gateways (CGWs) for delivery of signaling information to the call connection agent
    • Audible ring generation and network announcements
    • Value-added data services, Virtual Private Networks (VPNs), subscriber management and firewalls.
    The NMGW may also participate in the mechanism for dynamic bandwidth allocation over the Customer Premises Equipment (CPE) interface between voice and data applications to ensure the requested quality of service for the connection.

    The GR-3062 generic criteria present the architecture, interfaces, and functionality of the NGN Network Mediation Gateway. The intent is to ensure interoperability of the components within the NGN as well as for interworking with other networks and with Public Switched Telephone Network (PSTN) user equipment, without constraining the implementation choices available to the manufacturer. These generic requirements also describe the NMGW interactions with the Customer Gateway as well as the Call Connection Agent (CCA) and procedures for transporting user information and associated signaling and control information over the core packet network.

    When using GR-3062, you may need to refer to GR-507, AF-SIG-0061.000, and several IETF RFCs, AF-SAA-0124.000. You may also want to refer to GR-3051, GR-3053, GR-3054, GR-3055, GR-3058, GR-3059, GR-3060, GR-3061, GR-3070, and various ITU-T Recommendations.

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