Introduction to TMN

The term TMN is introduced by the ITU-T (the former CCITT) as an abbreviation for ‘Telecommunications
Management Network’. The concept of a TMN is defined by Recommendation M.3010. TMN has a strong relationship with OSI management, and defines a number of concepts that have relevance for Internet Management.

According to M.3010, “a TMN is conceptually a separate network that interfaces a telecommunications
network at several different points”. The relationship between a TMN and the telecommunication
network that is managed, is shown in Figure. According to this figure, the interface points between the TMN and the telecommunication network are formed by Exchanges and Transmission systems. For the purpose of management, these Exchanges and Transmission systems are connected via a Data Communication Network to one or more Operations Systems.

The Operations Systems perform most of the management functions; these functions may be carried out by human operators but also automatically. It is possible that a single management function will be performed by multiple Operations Systems. In this case, the Data Communication Network is used to exchange management information between the Operation Systems. The Data Communication Network is also used to connect Work Stations, which allow operators to interpret management information. Work Stations have man-machine interfaces, the definition of such interfaces fall outside the scope of TMN (Work Stations are therefore drawn at the border of the TMN).

Basic objectives for the TMN
Functions associated with a TMN
Architectural requirements

TMN functional architecture

• Function blocks
• Operations Systems Function block (OSF)
• Network Element Function block (NEF)
• Workstation Function block (WSF)
• Mediation Function block (MF)
• Q Adaptor Function block (QAF)

Functional components

• Management Application Function (MAF)
• Management Information Base (MIB)
• Information Conversion Function (ICF)
• Human Machine Adaptation (HMA)
• Presentation Function (PF)
• Mediation Function – Management Application Function (MF-MAF)
• Higher Layer Protocol Interworking (HLPI)

TMN Reference points

• Classes of reference points
• Definitions of reference points
• The q reference points
• The f reference points
• The x reference points
• The g reference points
• The m reference points
• Relationship of reference points to function blocks
• Communications Functions of the TMN
• Data Communication Function (DCF)
• Message Communication Function (MCF)

The TMN reference model

• TMN access from external sources
• Access between TMNs
• Access by network users
• Supporting external access to TMN functions

The TMN information architecture

• Object oriented approach
• Manager/agent
• Manager/agent/objects relationships
• Interworking between TMN function blocks
• Shared management knowledge
• Context negotiation
• Static context negotiation
• Dynamic context negotiation


• Relationships between domains
• Logical layered architecture
• TMN naming and addressing
• Principles for naming schemes

• Unambiguous naming
• Name structure
• Application layer names
• Addresses

The TMN physical architecture

• TMN building blocks
• Operations System (OS)
• Mediation Device (MD)
• Q Interface Adaptor (QA)
• Data Communication Network (DCN)
• Network Element (NE)
• Work Station (WS)
• Relationship of TMN building block names to TMN function blocks
• Interoperable interfaces
• Definitions of the standard interoperable interfaces
• Q interface
• F interface
• X interface
• Relationship of TMN interfaces to TMN building blocks
• TMN protocol families
• Consideration of reference and physical configurations
• Physical realization of the q class reference configuration

Communication functions

• DCN implementation examples
• MCF considerations

Detailed TMN architectural considerations

• General
• Messaging availability/reliability
• Operation systems
• Functional OS configuration
• Physical OS configuration
• TMN data communication considerations
• Data communication network considerations
• Message communication considerations
• Mediation
• Mediation considerations
• Processes of mediation
• Implementation of mediation processes
• Network element considerations
• Q-Adaptor considerations
• Work stations
• Presentation function
• g functions
• f functions

TMN standard interfaces

• Qx interface
• Q3 interface
• Planning and design considerations

Functional TMN hierarchy

• The management layers of the architecture
• Element management layer
• Network management layer
• Service management layer
• Business management layer
• Value added services