International telecommunication union

Study Group 2

– 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, SG 16) 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 SG 13.

Study Group 3

All Study Groups shall notify Study Group 3 at the earliest opportunity of any development which may have an impact on tariff and accounting principles including the related telecommunication economic and policy issues.

Study Group 4

As Lead Study Group for TMN, Study Group 4 has the responsibility of ensuring consistent application of TMN principles by all Study Groups in their development of TMN-related specifications. This may require that Study Group 4 develop guidelines for developing TMN specifications and/or review the structure and content of new and existing TMN Recommendations.

Study Group 4 in accepting responsibility for study of OSI system management from Study Group 7 must acknowledge and continue to support applications of resultant X.700-Series Recommendations that extend beyond TMN. This work is to continue as a collaborative effort with ISO/IEC JTC 1/SC 21.

For studies on maintenance of networks, including their constituent parts, Study Group 4 will cover the maintenance of:

• switched international circuits;

• leased circuits and supporting transmission networks;

• digital transport networks;

• mobile telecommunication systems.

The study will also require to cover:

• designation in the international networks;

• fault, performance and configuration management of ISDNs and B-ISDNs; and

• test and measurement techniques and equipments.

Study Group 5

There is no requirement at this time to provide points of guidance for Study Group 5.

Study Group 6

Responsible for studies involving all the physical aspects of outside plant including construction and installation but excluding optical and digital system design and maintenance. It cooperates with Study Group 15.

Study Group 7

Responsible for studies concerning data communications, data networks and open system communications.

Study Group 7 is to take the primary role for developing Recommendations in the following areas:

– open systems interconnection (X.200-, X.600-Series, etc.);

– message handling services and systems (F.400- and X.400-Series);

– directory services and systems (F.500- and X.500-Series);

– security, including frameworks, mechanisms and protocols (X.800-Series);

– open distributed processing (X.900-Series);

– packet and frame relay, including interworking cases for data communications;

– highly reliable (loss sensitive or assured) U-plane data communications protocols over ATM (e.g. X.25, X.45 or other OSI protocols over ATM), including interworking.

In addition, Study Group 7 is the Lead Study Group for:

– open distributed processing (ODP);

– frame relay;

– communication systems security.

With regard to GII and multimedia, Study Group 7 is responsible for detailed services and protocols in all of the above listed areas and from the viewpoint of data communications. Direction on what studies need to be undertaken in support of GII and multimedia will come from Study Group 13 and Study Group 16, respectively.

With regard to numbering, routing and network performance:

– Numbering, routing: Study Group 2 is responsible for general principles for numbering and routing applicable to all networks. Study Group 7 is responsible for detailed work on numbering and routing for public data networks, including Recommendations X.110, X.121, X.122 and X.353. Ongoing work is to take into account Recommendations on general principles established by Study Group 2.

– Network performance: Study Group 2 is responsible for general principles applicable to all networks. Study Group 7 is responsible for detailed work applicable to data networks, including Recommendations X.130-X.145.