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ITU-T Study Group 2 Area of Responsibility (Study Period 1997 - 2000)
Responsible for studies relating to:
  • General aspects of service definition related to telecommunication services;
  • PSTN based, ISDN(s), mobile and UPT services, principles of their interworking and relevant user quality of service (QoS);
  • network operations including routing, numbering, network management and service quality of networks (traffic engineering, operational performance and service measurements);
  • human factors;
  • service and operational aspects of fraud prevention.

Lead Study Group on Service definition, Numbering, Routing and Global Mobility
  • Study Group 2 is the Lead Study Group for service definition (including all types of services) for numbering and routing and for global mobility. Study Group 2 has a coordination role in studies on billing information (Phase one) and operational quality of service/network performance.
  • Study Group 2 shall define and describe services including FPLMTS in its area of responsibility from a user's point of view to facilitate global interconnection and interoperation and also ensure compatibility with the International Telecommunication Regulation and related intergovernmental agreements. It should also recommend QOS for each service and interact with other Study Groups (e.g. SG 13) in this respect as required.
  • Within its area of responsibility Study Group 2 should define services functionally on an end-to-end basis, deal with supplementary services, services facilitating access to basic services and with services that are supported by networks or by other services, such as telephone.
  • Study Group 2 should continue to study service policy aspects including those that may arise in the operation and provision of transborder, global and/or regional services, including those that offer both carriage and content components, taking due account of national sovereignty.
  • Bureau, document communication, directory and audiovisual/multimedia services are studied, except in the mobile environment, by other Study Groups (SG 7, SG 8, SG16) being responsible for relevant technologies. However, harmonization of service interworking and service operation aspects is required.
  • Study Group 2 is responsible for studying, developing and recommending general principles of numbering and routing for all types of network.
  • The Chairman of Study Group 2 (or, if needed the Chairman's delegated representative) should provide technical advice to the Director of the TSB concerning general principles for numbering and routing and the effect on allocation of international codes.
  • Study Group 2 should provide the Director of the TSB with advice on technical, functional and operational aspects in the assignment, reassignment and/or reclamation of international numbering and addressing resources in accordance with the relevant E- and F-Series Recommendations taking into account the results of any ongoing studies.
  • Study Group 2 recommend traffic engineering planning and dimensioning guidance for the implementation and operation of all types of networks and network elements.
  • Study Group 2 recommend measures to be taken to assure operational performance of all networks (including network management) in order to meet the in-service network performance and QOS.
  • If Study Group 2 identifies operating functions which need the support of network capabilities, these functions should be defined and described on the basis of the description method and network architectural principles as defined by SG13.

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