TMN provides a framework for achieving interconnectivity and communication across heterogeneous operations system and telecommunication networks.
The standard interface allows elements from different manufacturers to be incorporated into a network under a single management control.
For communication between Operations Systems and NEs (Network Elements), it uses the Common management information protocol (CMIP) or Mediation devices when it uses Q3 interface.
The TMN layered organization is used as fundamental basis for the management software of ISDN, B-ISDN, ATM, SDH/SONET and GSM networks.
Modern telecom networks offer automated management functions and are run by operations support system (OSS) software.