Methods, systems, and media are provided for interfacing components in a wireless telecommunications network. An interface allows for the efficient transfer of data that facilitates billing and operations functions. This data is transferred from proxy gateways to application servers to servers that provide billing functions and operations, administration, and management (OAM) functions. The interface enables the transmission by communicating a mobile switching center code, a proxy identifier, a traffic restriction flag, and a packet data unit type. By aggregating this information at the application server into a useful form for devices used in billing and operations, information technology (IT) overhead for billing and operations systems support is reduced. Also lowered is the congestion present on the network, as fewer links are necessary between servers and proxies. The proxy gateway is situated between a circuit-switched network providing access services and a packet-switched network providing connectivity services. The gateway also is coupled to an application server on the packet-switched network.