The Diameter protocol is an enabler. It allows service providers to add new functionalities to their networks that bring added value to services. By adding more value to services, service providers deliver more than just a pipeline; they bring value to the table and subscribers are willing to pay for this value.
In order to take advantage of Diameter, there are fundamental changes that must take place. Of course, TCP/SCTP/IP is the transport in the new Diameter network, and needs to be deployed throughout the core, as well as in the back office to support charging systems.