Element Management System
An Element management system (EMS) consists of systems and applications that are concerned with managing network elements (NE) on the network element management layer (NEL) of the Telecommunication Management Network model.
As recommended by ITU-T, the Element Management System's key functionality is divided into five key areas - Fault, Configuration, Accounting, Performance and Security (FCAPS). Portions of each of the FCAPS functionality fit into the TMN models. On the northbound the EMS interfaces to Network Management Systems and or Service Management Systems depending on the deployment scenario. Southbound the EMS talks to the devices.
References:
http://www.ems-info.synthasite.com
http://en.wikipedia.org/wiki/Element_management_system
http://www.iec.org/online/tutorials/ems/
http://www.dhyanit.com/
http://www.element-management-system.com
