Rationale: This project reviews and revises, where and when appropriate, the existing service-related ITU-T Recommendations, including international telephone, international telecommunication charge card, international freephone, international premium rate, international shared cost services, ISDN, UPT, and mobility services.

Ongoing

Rationale: This project will assess the impact of introduction of IP-based networks and interworking with IP-based networks to determine what new services, service features, and service principles for interworking may need to be defined to take advantage of this technology. Suggested topics for study include:

• new services and new supplementary services on IP-based networks;
• analysis of IP-based implementations of various services (e.g. UPT);
• service principles for existing defined services and supplementary services when provided on or interworking with IP-based networks;
• support for differentiated QoS IP services;
• the impacts of QoS on customer expectations;
• the need for and method of implementing terminal and personal mobility;
• the manner in which mobile users can access emergency services when roaming.

E.callflows - 2001

Supplement No. 1 to Rec. E.370 - 2001

Rationale: This project will continue to assess where assignment and administration procedures for the ITU 89-block need to be improved. In addition, this project will assess any potential changes to the length of country codes on the structure of charge card numbering.

Rev. Rec. E.118 - 2001

Rationale: This project will study mechanisms that can be used to terminate, or optionally redirect, the transmission of a facsimile message that arrives erroneously at a voice telephone terminal. Fax machines, upon detecting the DTMF tones of the supplemental service, may then terminate subsequent attempts to deliver the facsimile message at this number.

2001

Rationale: There is a user requirement for roaming to be supported by an intelligent network infrastructure that facilitates optimal routing. With optimal routing there is a user expectation that call charges should be cost related. There is an operational and service requirement for the development of signalling capabilities to convey the exchange of charging information which will enable the appropriate billing and settlement functions to take place.

Rationale: The examination and definition of the service and operational aspects that arise when mobile users of satellite systems continue to be served by one network but move from one national jurisdiction to another. This is sometimes referred as "visiting" to differentiate it from "roaming" which occurs when a mobile user moves from one network to another. Service and operational aspects may include but not be limited to the need to satisfy National regulatory requirements which may involve for example Legal Intercept and Tax Liabilities.

Rationale: Where the geographical location of a calling party does not relate directly to the point of network access, there may be a need to define the user location. This may be important for the handling of calls to nationally designated emergency services which are supported by international mobile networks.

The information content of telephone numbers whether as the dialled number of the called party or in the calling line identification of the calling party may be useful in the prevention or the tracing of malicious or fraudulent calls. The objective would be to define the service and operational requirements to facilitate this goal. Close cooperation with the work on Numbering, Naming and Addressing is required.

Rationale: There is a need to support developing countries in migrating from legacy networks such as the telex network to more modern means of communication, possibly supported on IP networks. The feasibility of using interworking arrangements should be studied as an interim measure.

2001