mmendation M.3010. At the end of this chapter you will have a good understanding of TMN and its different management architectures comprising of functional, physical, information, and logical architecture. 2.1 Introduction TMN stands for Telecommunications Management Network. The concept of TMN was defined by ITU-T in recommendation M.3010. The telecommunica- tions management network is different from a telecommunication network. While the telecom network is the network to be managed, TMN forms the management system for the network to be managed. This is shown in Figure 2.1 and is explained in more detail in the next section. The recommendations from ITU-T on TMN are listed in Table 2.1. Recommendation M.3010 defines general concepts and introduces several man- agement architectures to explain the concept of telecom network management. The architectures are: Functional architecture: It defines management functions. Physical architecture: It defines how to implement management functions into physical equipment. Information architecture: Concepts adopted from OSI management. Logical architecture: A model that splits telecom management into layers based on responsibilities. Fundamentals of EMS, NMS and OSS/BSS Table 2.1 TMN Recommendations Recommendation Number Title M.3000 Overview of TMN recommendations M.3010 Principles for a TMN M.3020 TMN interface specification methodology M.3100 Generic network information model M.3101 Managed object conformance statements for the generic network information model M.3180 Catalog of TMN management information M.3200 TMN management services: overview M.3207.1 TMN management services: maintenance aspects of B-ISDN management M.3211.1 TMN management services: Fault and performance management of the ISDN access M.3300 TMN management capabilities presented at the F interface M.3320 Management requirements framework for the TMN X-interface M.3400 TMN management functions M.3600/3602/3603/3604/36 TMN Recommendations for ISDN 05/3610/3611/3620/3621/36 40/3641/3650/3660 2.2 What Is TMN