Service providers are faced with having to understand how they can add value to existing telecommunication networks, both mobile and fixed. They include, ISP's intelligent network, call completion, charge/calling card to name a few.
Their networks have to interface to and evolve with those operators providing customer access, back-haul, or channels to market. With interfaces existing at an infrastructure, operational and business process level. Even 'virtual' operators have to understand how they interface into the operational business processes of selected wholesale carriers. See network creation, support services and WayesHR.