An Element Management System (EMS) manages specific types of one or more network elements within a telecommunication management network (TMN). In most cases it is the job of the EMS within a network element to manage functions and capabilities, but not necessarily traffic. The EMS communicates upward to higher-level systems of network management (NMS), in order to manage the traffic between itself and other network elements.
The EMS is a critical part of the telecommunications management solution. One reason is that the EMS is the only exposed network element within the TMN and acts as the mediator of the information. It also controls the network elements within a network management system.