Responsible for studies relating to:

• principles of service provision, definition and operational requirements of service emulation;
• numbering, naming, addressing and identification requirements and resource assignment including criteria and procedures for reservation, assignment and reclamation;
• routing and interworking requirements;
• human factors;
• operational and management aspects of networks including network traffic management, designations, and transport-related operations procedures;
• operational aspects of interworking between traditional telecommunication networks and evolving networks;
• evaluation of feedback from operators, manufacturing companies and users on different aspects of network operation;
• management of telecommunication services, networks, and equipment via management systems, including support for next-generation networks (NGN) and the application and evolution of the telecommunication management network (TMN) framework;
• ensuring the consistency of the format and structure of IdM identifiers; and
• specifying interfaces to management systems to support the communication of identity information within or between organizational domains.

Responsible, among others, for studies relating to tariff and accounting matters (including costing methodologies) for international telecommunication services and study of related telecommunication economic, accounting and policy issues. To this end, Study Group 3 shall in particular foster collaboration among its members with a view to the establishment of rates at levels as low as possible consistent with an efficient service and taking into account the necessity for maintaining independent financial administration of telecommunication on a sound basis.

Study Group 5 is responsible for studying ICT environmental aspects of electromagnetic phenomena and climate change.

Responsible for studies relating to protection of telecommunication networks and equipment from interference and lightning.

Also responsible for studies related to electromagnetic compatibility (EMC), to safety and to health effects connected with electromagnetic fields produced by telecommunication installations and devices, including cellular phones.

Responsible for studies on the existing copper network outside plant and related indoor installations.

Responsible for studies on methodologies for evaluating the ICT effects on climate change, publishing guidelines for using ICTs in an Eco-Friendly Way, and energy efficiency of the power feeding system.

Also responsible for studying design methodologies to reduce environmental effects such as recycling related to ICT facilities, equipments, etc.

Responsible for studies relating to:

• use of telecommunication systems for contribution, primary distribution and secondary distribution of television, sound programmes and related data services including interactive services.
• use of cable and hybrid networks, primarily designed for television and sound programme delivery to the home, as integrated broadband networks to also carry voice or other time-critical services, video on demand, interactive services, etc.

Responsible for studies relating to signalling requirements and protocols, including those for IP-based networks, NGN, mobility, some multimedia related signalling aspects, ad hoc networks (sensor networks, RFID, etc.), QoS, and internetwork signalling for ATM, N ISDN and PSTN networks. This also includes reference signalling architectures and test specifications for NGN and emerging networks (e.g., USN).

Responsible for Recommendations on performance, Quality of Service (QoS) and Quality of Experience (QoE) for the full spectrum of terminals, networks and services ranging from speech over fixed circuit-based networks to multimedia applications over networks that are mobile and packet based. Included in this scope are the operational aspects of performance, QoS and QoE.

A special focus is given to interoperability to ensure end-to-end users' satisfaction.

Responsible for studies relating to the requirements, architecture, evolution and convergence of future networks. Also includes NGN project management coordination across study groups and release planning, implementation scenarios and deployment models, network and service capabilities, interoperability, impact of IPv6, NGN mobility and network convergence, public data network aspects and network aspects of IdM. Responsible for studies relating to network aspects of mobile telecommunication networks, including International Mobile Telecommunications (IMT), wireless Internet, convergence of mobile and fixed networks, mobility management, mobile multimedia network functions, internetworking, interoperability and enhancements to existing ITU T Recommendations on IMT.

Study Group 15 is responsible in ITU T for the development of standards on optical transport networks and access network infrastructures, systems, equipment, optical fibres and cables, and their related installation, maintenance, test, instrumentation and measurement techniques, and control plane technologies to enable the evolution toward intelligent transport networks. This encompasses the development of related standards for the customer premises, access, metropolitan and long haul sections of communication networks.

Responsible for studies relating to ubiquitous applications, multimedia capabilities for services and applications for existing and future networks, including NGN and beyond. This encompasses accessibility, multimedia architectures, terminals, protocols, signal processing, media coding and systems (e.g. network signal processing equipment, multipoint conference units, gateways, and gatekeepers).

Responsible for studies relating to security including cybersecurity, countering spam and identity management. Also responsible for the application of open system communications including directory and object identifiers, and for technical languages, the method for their usage and other issues related to the software aspects of telecommunication systems.

• Study Group 4
• Study Group 6
• Study Group 7
• Study Group 8
• Study Group 10
• Study Group 19
• SSG

• ITU-T Study Groups (Study Period 2005-2008)
• ITU-T Study Groups (Study Period 2001-2004)
• ITU-T Study Groups (Study Period 1997-2000)