The Diameter Enabler base interacts with one or more of the following entities, which are referred to as Diameter peers or simply peers: Home Subscriber Server (HSS), Charging Collection Function (CCF), Online Charging System (OCS), and Diameter agents.
The Diameter Enabler base establishes direct TCP connections with these entities and acts as a Diameter gateway: receiving and replying to Web service requests on the one side while sending and receiving Diameter packets on the other. This eliminates the need for you to develop applications that use the Diameter protocol.