nfiguration, alerts, collection, and storage Remote software download and remote backup and restore Total Access Intuitive, user-friendly configuration and Element management GUI Management Automatically discovers ADTRAN devices System from ADTRAN Stores performance information Real-time and historical trend analysis and reporting Scalable architecture, multiuser system Tropos Control Configuration Element Network monitoring Management System Network health What Is EMS? Table 1.1 Some Popular EMS Products (Continued) Product Key Features Verso Clarent Browser-based easy configuration Element Configuration and process management Management System Real-time command center and call control monitoring Supports C5CM associations with third-party edge devices Multiple levels of user access permissions Subscriber portal providing subscribers Secure socket layer encryption Standardized interfaces: SNMP, XML, JDBC Visual Guardian Fault management Element Service provisioning Management System Manufacturing Performance management Preventive maintenance architecture. The need for element management systems and the characteristics of an ideal EMS is covered. To give the reader familiarity with the EMS products and functionalities, a data sheet is also provided that shows some of the leading EMS products and their features. The information provided in the data sheet can be obtained from the company Web site that will give more information on the products. Additional Reading 1. Vinayshil Gautam. Understanding Telecom Management. New Delhi: Concept Publishing Company, 2004. 2. James Harry Green. The Irwin Handbook of Telecommunications Management. New York: McGraw-Hill, 2001. 3. Kundan Misra. OSS for Telecom Networks: An Introduction to Network Management. New York: Springer, 2004. Chapter 2 TMN Model This chapter is intended to provide the reader with an understanding of Telecommunications Management Network introduced by ITU-T (International Telecommunication Union-Telecommunication Standardization Bureau) and defined in reco