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.