============================================================ Question 1/III - General principles for the least of international private telecommunication circuits (permanent Question - continuation of Question 1/III studied in 1985-1988) Amendments and additions to Recommendation D.1. Reasons for the study It would be desirable to continue, in the light of the experience acquired by administrations or RPOAs, the study of Recommendation D.1 relating to international private leased telecommunication circuits. ============================================================ Question 2/III - Special conditions for the lease of continental telecommunication circuits for private service (permanent Question - continuation of Question 2/III studied in 1985-1988) Amendments and additions to Recommendation D.2. Reasons for the study Recommendation D.2 sets out special conditions for the lease of continental private telecommunication circuits. The revision of this Recommendation constitutes a permanent Question which is constantly evolving as a result of technical and economic developments. In particular, consideration will no doubt be given to: a) the degree of difference between the coefficients for telephone- type and telegraph-type circuits, taking into account: 1) the relative costs of provision of the circuits; 2) the implications that there might be if certain users were to take on a common carrier role; 3) market developments; b) the scale of coefficients which should be established for charging for telephone-type circuits, taking particular account of: 1) the various types of circuit provided, the cost of providing them and their conditions of use; 2) general policy factors; 3) the experience acquired by administrations and the expanding requirements of customers; c) the extra charges which might be established for telephone-type circuits having special properties, for example, circuits meeting the technical specifications of Recommendations M.1020 and M.1025; d) the tariff implications of the gradual introduction of digital transmission techniques and the new facilities thus available, in liaison with the study of Question D/III; e) the coherence to be maintained between the tariff principles applicable to public data transmission services and those applicable to international private leased circuits. ============================================================ Question 3/III - Special conditions for the lease of intercontinental telecommunication circuits for private service (permanent Question - continuation of Question 3/III studied in 1985-1988) Amendments and additions to Recommendation D.3. Reasons for the study A continuous review of the provisions of Recommendation D.3 is required in the light of experience and new developments in telecommunications. Study of this Question requires that special attention should be given to examination of: 1. special tariff and charging principles which might be developed for special quality circuits, for example those meeting the technical specifications set out in Recommendations M.1020 and M.1025; 2. the tariff implications of the gradual introduction of digital transmission techniques and the new facilities thus available, in liaison with the study of Question D/III; 3. the coherence to be maintained between the tariff principles applicable to public data transmission services and those applicable to international private leased circuits. ============================================================ Question 4/III - Tariff principles for the leasing of international transmission facilities intended for the transmission of data by digital techniques (continuation of Question 4/III studied in 1985-1988) Reasons for the study The considerable increase in requirements for high speed data transmission has been partially met by the leasing of analogue facilities, the applicable tariff principles having been incorporated in Recommendations D.2 and D.3. Current technological trends suggest that digital transmission will become generalized both for telephony and for data in international relations. At this stage it would be desirable to continue, in the light of the experience acquired by various administrations or RPOAs in the supply of digital channels, the study of Recommendation D.8 with special reference to: - the level of performance inherent in digital techniques, making it possible to offer new facilities; - the coexistence of land and satellite systems, with significantly different cost structures; - the possibility of supplying non-permanent services (e.g. booking at fixed times); - the prospects opened up by the progressive integration of satellite systems in digital networks. Special attention should also be paid to work on ISDN tariffs. ============================================================ Question 5/III - Development of tariff principles for international telecommunication services to meet the specific requirements of certain categories of users that are not covered by the international private leased circuit service as defined in Recommendations D.1, D.2 and D.3. The study will include continued consideration of Recommendation D.6 (continuation of Question 5/III studied in 1985-1988) Reasons for the study For the study of this Question, the following factors should be specially taken into consideration: 1) the potential of existing and/or planned public networks to satisfy the demand for telecommunication services sought by users in specialized private networks; 2) the tariff arrangements that might be appropriate for customers inclined to favour specialized private networks for economy reasons and whose requirement might be satisfied as far as possible by the means identified in 1. It is also desirable to take the following points into consideration: a) requests for the establishment of specialized private networks normally arise from the unique system requirements of certain categories of users as well as the technical and/or economic advantages that might be derived from using these networks, given certain prevailing market conditions, tariff structures and technical requirements. Administrations are sometimes unable to satisfy these requirements and this may lead some users to press for the creation of specialized private networks which are not permitted under Recommendation D.1 and only exceptionally under Recommendation D.6; b) administrations may experience adverse economic effects from the considerations identified in a) above; c) certain users may experience adverse effects from the lack of timely, cost-effective solutions of their particular problems; d) recommendations are needed concerning the provision of specialized services by administrations; e) there is an increasing demand by users for specialized services and, consequently, an increasingly urgent need for appropriate studies. ============================================================ Question 6/III - General tariff and accounting principles applicable to data communication on public data networks (continuation of Question 6/III studied in 1985-1988) (To be studied in liaison with Study Groups I and VII.) Reasons for the study A continuous review of the provisions of Recommendations D.10, D.13 and D.30 is required in the light of experience and new developments in telecommunications. For the study of this Questions, attention should be given to the following items: 1. An ongoing review of the general tariff principles which should be applied to public data communication services provided on public data networks. 2. Should different tariff principles apply depending on the type of data communication service utilized, class of user of the service and the additional facilities involved? 3. The development of accounting and tariff principles for message handling services and directory services. 4. The effect of text communication services on the charging systems for public data network services. 5. Tariff principles associated with reverse charging (packet and circuit). 6. Questions 21/III, 22/III and 23/III concern charging and accounting principles to be applied to the services offered by an integrated services digital network (ISDN) to the non-voice services provided by interworking between the ISDN and existing public networks and to permanent and reserved services within the ISDN. Note - This Question is to be studied by Study Group III in association with Study Group VII which will be responsible, in particular, for supplying the necessary information on the technical characteristics of the networks envisaged. To that end, close cooperation should be sought between Study Group III and Study Group VII during the whole study period. ============================================================ Question 7/III - Tariff principles and accounting arrangements for public data communication services on public packet-switched networks (continuation of Questions 7/III and 10/III studied in 1985-1988) (To be studied in liaison with Study Groups I and VII.) Reasons for the study A continuous review of the provisions of Recommendations D.11 and D.12 is required, in the light of experience and new developments in telecommunications, as regards the tariff principles for packet-switched services utilizing the virtual circuit facility and other possible packet- switched applications. In addition, a continuation of the work which commenced in the 1985- 1988 study period towards development charging principles which would promote usage of public packet-switched data networks is required. 1) Tariff principles for public data communication services on public packet-switched networks. Particular attention should be given to the following items: a) determination of the chargeable and non-chargeable packets for international packet-switched data communication service; b) consideration of the segment length as the measurement unit for charging for the volume of information transmitted; c) tariff principles covering facilities such as direct call and fast select; d) tariff principles associated with reverse charging; e) international accounting and especially a possible restructuring of accounting rates in order to account duly for the volume of information transmitted; f) the introduction of a cost-based fixed transit rate; g) the work of Questions concerning ISDN pertaining to public packet- switched data networks; h) the development of tariff principles for the permanent virtual circuit should arise sufficient demand for this service. 2) Accounting arrangements to promote the use of public packet- switched data networks. Particular attention should be given to the following items: a) Short transaction transmissions - Work should continue on the development of tariff principles for the possible use of the fast select with restriction option as a means of providing short duration calls on the public packet-switched data networks. b) Batch mode transmissions - Further study is required concerning the desirability of promoting batch mode transmission on public packet-switched networks and the accounting arrangements which would accomplish this (volume discounts vs. distinct time and volume accounting and collection rates). ============================================================ Question 8/III - Tariff principles and accounting arrangements applicable to public data communication services in public circuit- switched networks (continuation of Question 8/III studied in 1985-1988) (To be studied in liaison with Study Groups I and VII.) Reasons for the study A continuous review of the provisions of Recommendation D.20 is required in the light of experience and new developments in telecommunications. ============================================================ Question 9/III - General tariff and accounting principles for the different public data communication network interworking options (continuation of Question 9/III studied in 1985-1988) (To be studied in liaison with Study Groups I and VII.) What Recommendations are appropriate to guide the development of tariff principles for services that involve interworking between different types of public network? Reasons for the study For the study of this Question, attention should be given to the following items: 1. An ongoing review of the requirement for guiding principles resulting from the possible provision of international public data network services offered by means of interworking between networks (e.g. packet and circuit). 2. Possible development of guiding principles allow the Working Parties studying interworking tariff options to address interworking within specific service applications in a cohesive and unified manner. Guiding principles are also of assistance to other Study Groups where the study of interworking forms part of their work programmes. ============================================================ Question 10/III - Tariff principles in the international public telegram service, including the phototelegraph service (continuation of Question 11/III studied in 1985-1988) (To be studied in liaison with Study Group I.) Study of possible amendments and additions to the D-Series Recommendations relating to charging and accounting in the international public telegram service. Reasons for the study These Recommendations will require continuing study in the light of experience and new developments in telecommunications. ============================================================ Question 11/III - Tariff principles in the international public telemessage service (continuation of Question 12/III studied in 1985- 1988) (To be studied in liaison with Study Group I.) Study of the charging and accounting principles in the international public telemessage service and continued further development of the D-Series Recommendations to include, inter alia: - charging principles and structure(s); - international accounting arrangements; - arrangements relating to refunds; - transit services. ============================================================ Question 12/III - Tariff principles for the international telex service (continuation of Question 13/111 studied in 1985-1988) (To be studied in close collaboration with Study Group I.) 1. Study of possible amendments and additions to the existing D-Series Recommendations relating to charging and accounting for the international telex service. 2. Study and development of charging and accounting principles for new telex services and facilities and in particular the preparation of a draft Recommendation concerning charging and accounting for interworking between telex and other services, taking into account the general principles and operational aspects developed by Study Group I. ============================================================ Question 13/III - Tariff principles for international public facsimile services (continuation of Question 14/III studied in 1985-1988) Study of possible amendments and additions to the D-Series Recommendations relating to charging and accounting in the Bureaufax and Telefax services and interworking activities between those two services; possible development of tariff principles for the Telefax 41 service and for the Telefax service in the ISDN environment. Reasons for the study In conjunction with Study Group I's operational studies relating to Telefax 4, Study Group III should consider: - charging principles; - arrangements relating to international accounting; - arrangements relating to refunds; taking into account existing Recommendations on Bureaufax and Telefax. Future studies on international public facsimile services should also include the following items: - interworking with other services, e.g. Teletex, Videotex, etc.; - mixed mode operations; - wideband and higher speed services; - transit services. ============================================================ Question 14/III - Tariff principles for the international Teletex service (continuation of Question 15/III studied in 1985-1988) (To be studied in liaison with Study Group I and other relevant Study Groups.) Study of possible amendments and additions to Recommendation D.50 relating to charging and accounting in the international Teletex service. Reasons for the study This Recommendation will require continuing study in the light of experience and new developments in telecommunications. Future studies of the international Teletex service should include: -interworking between networks of different types (PSPDN, CSPDN, PSTN and ISDN) in direct and in transit relations; - - - - - - - - - - - - - - - 1 The definition and description of Telefax 4 are given in Recommendation F.184. -complementary network facilities available to subscribers (including Message Handling Service based on the X.400-Series of Recommendations); -interworking with other services (with the telex service and other services such as Telefax and Videotex); - mixed mode operation; - interconnection of telex-Teletex-conversion facilities. ============================================================ Question 15/III - Tariff and international accounting principles to be applied in the Videotex services (continuation of the study of Question 16/III considered during the 1985-1988 study period) (This Question is to be studied in liaison with Study Groups I and VIII.) Reasons for the study The subject of this Question requires continuous study in the light of experience gained and advances made in telecommunications. Study of this Question should take particular account of the guidelines developed during the 1985-1988 study period (see annex to this Question). Future studies on charging in the international Videotex service should expand the focus of the 1985-1988 study period to include the following points: -possible use of units other than duration for remunerating the costs of the "communication" element; - possible use of new units for remunerating application costs; -presentation to the user of application and possibly communication costs (in which currency? possible conversion rules); -differentiation if necessary between the "application" and "communication" elements; -reverse charging for the "communication" element and negative application charge (bonus, rebate, credit); - processing of complaints, refunds; - free status of test traffic; - fiscal problems relating to application charges; - use of the ISDN for the Videotex service; - complementary network facilities offered to subscribers. ANNEX (to Question 15/III) Tariff and accounting guidelines for the international Videotex service Preamble This annex sets out the general principles and conditions for charging and international accounting which could be applied by administrations for the provision of the international Videotex service*. It takes into account the two specific cost elements involved: Communication costs and Applications costs. 1. General principles In determining tariff principles to be applied to this service, consideration should be given to the structure and level of charges applicable to other international telecommunication services supplied by the administrations concerned, and to the provisions of Recommendation D.5. In principle, tariffs developed for Videotex services should: -be flexible enough to enable new needs to be accommodated as the service develops; -be as administratively simple as possible; -be easily understood by subscribers. 2. Explanation of some terms specifically related to the Videotex service Communication costs The costs of the use of the public networks and dedicated Videotex equipment, between the user and the application. Application costs The price of the information and/or transaction provided to the user. Country A The country in which the user of a Videotex terminal originates a Videotex call. Country B The country which receives a Videotex call from country A. - - - - - - - - - - - - - * See also Recommendation F.300 3. International accounting 3.1 Communication element 3.1.1 The costs for the Videotex communication service incurred in country A (including the costs for the use of the national public networks and the international Videotex equipment of country A) are covered by the collection charges levied in this country and are not included in the international accounting. 3.1.2 The level and division of the accounting rate for the international network used are those normally applied to that network, as regulated by the relevant Recommendations. 3.1.3 The costs for the provision of the Videotex communication service in country B are covered by an accounting share calculated on a duration basis in order to cover the following cost elements: a) the use of the international Videotex equipment of country B; b) the data transmission between the international Videotex equipment and the Videotex service in country B; c) the use of the Videotex service in country B; d) the use of data transmission between the Videotex service in country B and possible external computers. As cost elements c) and d) may vary according to the time of day or service offered, the remuneration of these elements may be dynamically specified by country B. Note 1 - Not all items may be involved in all Videotex service communications. Note 2 - Pending the outcome of possible cost studies, the level of the accounting share for elements a) and b) will be determined by bilateral agreement. Note 3 - Calculation of the accounting share on a volume or other basis is for further study. 3.2 Application element In the following cases, the application costs are remunerated via international accounting: -the application is provided by third parties, but the administration of country B acts as an agent for its remuneration; -the application is provided by the administration of country B. It may be necessary to identify different types of application charges for commercial or legal reasons. Note 1 - In a case where a user signs a direct contract with a third party application provider in country B or with the administration of country B, remuneration is not handled by international accounting; these guidelines do not apply to such a case. Note 2 - In a case where a Videotex service provider in country A signs a direct contract with a third party application provider in country B, remuneration is not handled by international accounting; these guidelines do not apply to such a case. 4. Collection charges The establishment of collection charges is a national matter. 4.1 Communication element The charge collected from the user shall cover the end-to-end costs incurred for the provision of the Videotex communication service. 4.2 Application element 4.2.1 General The collection charge includes the application element when the latter is remunerated via the international accounting (see 3.2). 4.2.2 Charging units Application costs can be remunerated through the following units: -frame; - duration; - transaction. Other units are for further study. The application charges are usually subject to agreement between the application provider and the Videotex service provider of country B. These charges may be subject to limits set by bilateral agreement between the Videotex service providers involved. 5. Exchange of charging data Information about the application and possibly communication costs is usually only available in country B. These costs may vary during a session. Therefore it is necessary to transmit this information to country A in order to: - bill the user; -inform the user in advance about the costs of the application or Videotex service requested (if this facility is provided); -support the "cost limit" facility (if this facility is provided). To meet these requirements concurrent transmission of charging data is recommended. In case of duration based application or communication charges with a constant level during a given session, the concurrent transmission of the charging data may not be necessary. In this case the administration of country A can charge the user dependent upon the selection of the application or network address. This implies that the administration of country A is informed beforehand about the charging levels related to the relevant application or network address. "Post session" transmission of billing information is for further study. 6. Recording of charging information The administration of country B is responsible for keeping the records for accounting purposes. In order to maintain consistency between the records in the two countries, individual charges and modifications to the time based charges may need to be acknowledged by country A before being officially recorded by country B. The unit time for duration based charges is subject to the capabilities of the Videotex services involved. The chargeable period starts when the international Videotex equipment of country B detects that the requested service or application is connected. It stops when this equipment detects that the service or application is disconnected from country A. The charge is the chargeable period rounded up to the next unit of time, multiplied by the current rate. The start and stop of the chargeable period and/or the charge may be transmitted to country A. Note - Reverse charging of communication charges and negative application charges (credit) are for further study. 7. Exchange of accounting data The accounts (which exclude the accounting share, see 3.1.3) are expressed in the currency of country B. The administration of country A may wish to be remunerated for collecting charges for the administration of country B, but the application provider should be paid for his information at the same rate as for national access. The remuneration of the costs incurred by country A and country B for acting as agents of the application provider is for bilateral agreement. 8. User complaints and refunds A user in country A should complain to the administration of country A. An application provider in country B should complain to the administration of country B. The problem of refunds is for further study. 9. Test traffic The provisions of free access for test traffic is for further study. ============================================================ Question 16/III - Revision and amendment, if necessary, of charging accounting and associated procedures set forth in the Recommendations on charging and accounting in the international telephone service, their methods of application and the treatment to be applied to them (permanent Question - continuation of Question 17/III studied in 19851988) Reasons for the study Given that WATTC-88 has prepared new Regulations which have an impact on charging and accounting of international telephone service, further study is required. These studies should cover the development, revision and amendment, if necessary, of Recommendations required to provide the appropriate guidance to administrations. Independently of general problems concerning charging and accounting in the international telephone service, special attention should be given to studying charging and accounting principles for international service calls. On that point in particular, and taking into account all the contributions introduced in the previous study period. 1. All the administrations represented in Working Party III/4 accepted the principle that service communications should be excluded from international accounts, although attention was drawn to the fact that such exclusion must not entail complications in international accounting and the expense involved in identifying these service calls precisely or at least adequately. 2. Administrations are invited to consider the practical and financial implications of the principle set out in section 1 above, the final aim being to adopt a single, simple method for dealing with this type of traffic in the accounts and to prepare an appropriate Recommendation. 3. Considering that it may be difficult or impossible for certain administrations to identify this type of traffic accurately in the case of automatic operation, the following points should be considered when preparing contributions on this subject: a) Should the exclusion of service calls from international accounting be subject to bilateral agreement between the two terminal administrations concerned? b) Should the exclusion concern only automatic service calls, i.e. those which in some cases are difficult or impossible to identify accurately? c) In the absence of bilateral agreements, should service calls appear ipso facto in the international accounts and, if so, should this procedure be confined only to automatic service calls? d) If one of the administrations in a given relation can identify automatic service calls but the other administration cannot, what alternative method could be equitably applied to the international accounts? ============================================================ Question 17/III - Occasional provision of circuits for international sound and television programme transmissions (continuation of Question 18/III studied in 1985-1988) Revision of the provisions of Recommendation D.180 on the ordering procedures and charging principles for the occasional provision of circuits used for sound and television programme transmissions Reasons for the study In view of the continual change and development in sound and television programme transmissions between countries and continents, the provisions of this Recommendation should be regularly reviewed. ============================================================ Question 18/III - Leased international (continental and intercontinental) sound and television programme circuits (continuation of Question 19/III studied in 1985-1988) What further amendments and additions should be made to Recommendation D.4 to define the tariff principles which should govern the conditions and charges to be applied to the lease, for private use, of: a) international sound programme circuits, b) international television circuits? Reasons for the study The growing number of international sound and television programme circuits leased by broadcasting organizations for the transmission of programmes, the changes which have occurred in their use and the desire to provide more efficiently for future operations have led administrations to consider the need to review the present provisions of Recommendation D.4. Particular attention is to be paid to the potential use of digital facilities and to their implications in the provision of international (continental and intercontinental) sound and television programme circuits. ============================================================ Question 19/III - General tariff principles for mobile telecommunications services (continuation of Question 20/III studied in 1985-1988) (To be studied in liaison with Study Group I and II.) Mobile telecommunications comprise three distinct services with a common need to be connected with the international network and to interconnect with other mobile service networks, but each with its own particular operational needs and problems. For these reasons, the following Question is broken down into three separate sections: a) land mobile service; b) maritime mobile and maritime mobile-satellite services, and c) aeronautical mobile service. a) Land mobile service Considering (a) that a first Recommendation has been developed to cover charging and accounting principles for the initial offering of an international telephone service, What new Recommendations or amendments to existing Recommendations are required to provide for: - other telecommunications services, - subscriber services, - charging data collection, -charging and accounting issues arising from the work of other CCITT and CCIR Study Groups, for example, the impact of the ISDN, - interconnection with other mobile service networks? b) Maritime mobile and maritime mobile-satellite services Considering (a) that the maritime mobile and, more particularly, the maritime mobile-satellite services are continuing to develop new services and facilities; (b) that the connection of these new developments to international telecommunication networks and to other mobile service networks will require the application of new charging and accounting principles; (c) that there is a continuing urgent need to further refine accounting and settlement procedures and to resolve issues relating to the currency of payment and currency conversion, What new Recommendations or amendments to existing Recommendations are required to meet the changing operational needs of the maritime mobile and maritime mobile-satellite services, to further refine accounting and settlement processes and to provide for the interconnection of these services with other mobile service networks? c) Aeronautical mobile service Considering (a) that during the 1989-1992 study period, many administrations* will be introducing public aeronautical mobile services; (b) that there are no existing Recommendations addressing charging and accounting for such services, What new principles need to be established to cover charging, accounting and settlement aspects relating to the three types of service: - HF radio, - UHF satellite, - UHF/VHF direct air/ground, for telephone and data, including telex, services in the air-to-ground direction and including interconnection with other mobile service networks? Study of the telephone service should take priority. A number of scenarios have already been identified by Study Group III to assist with this study. ANNEX (to Question 19/III) 1. Basis for the further study of charging and accounting principles for the aeronautical mobile service 1.1 The study of the aeronautical mobile service Question should take into account the possible tariff scenarios already identified for the aeronautical telephone service as listed below, and should expand/add to these as appropriate: 1.2 Charging: -aeronautical link, including ground station component; -terrestrial public network link (national/international); -any other additional charges, e.g. aeronautical mobile station charge. 1.3 Possible methods of payment: -by passengers - commercial credit card, - administration* credit cards; -by aircraft operators (e.g. corporate aircraft) - direct billing. 1.4 International accounting and settlements: -international terrestrial link traffic to be included in regular international accounts; -any additional settlement requirements and procedures to be identified. 2. Minimum requirements for charging data collection in PLMNs for roaming mobile stations 2.1 Introduction Information to be collected for charging purposes in an MSC for calls from (and to) an MS roaming in a foreign PLMN are listed below. Experience from operating the NMT-system has shown that possibility to handle customer complaints regarding charging of calls requires a minimum amount of data. The list presented below is prepared as a basis for further work on Recommendations in this field in the CCITT. 2.2 Charging data 2.2.1 Calling party identification (A-party): - ISDN-number; - IMSI; - MSEI; A-number indicators showing: - own mobile station; - visiting mobile station; - visiting mobile station with temporary subscription. A-party category information related to charging. 2.2.2 Called party identification (B-party) Cf. 2.2.1 (B-party category is the information received as end-of- selection signalling information). 2.2.3 Charged party information: - charging of the A-subscriber; IMSI - charging of the B-subscriber; IMSI 2.2.4 Date and times for: - radio channel seizure; - start of charging; - call release and/or chargeable duration; - handovers (Note). Note - The requirement to register the times for handovers is for further study (e.g. if frequency hopping is used in a system, this may complicate how to define the times to be registered in cases where handover in one cell may be used as well). 2.2.5 Type of channel or facility used: - full rate channel; - half rate channel; - user to user message [FFS] 2.2.6 Base stations/cells and channels used Information on base stations/cells used during a call (see also the note of 2.2.4). 2.2.7 Call release information: - normal A-party clearing before start of charging; - normal B-party clearing before start of charging; - normal A-party clearing after start of charging; - normal B-party clearing after start of charging; - base station initiated call release; - MSC initiated call release. 2.2.8 Exchange data: - identity of MSC; - incoming route (Note); - outgoing route (Note). Note - Several routes may be registered for one call in case of handover. Cf. the note of 2.2.4. 2.2.9 Subscriber services information: - activation/deactivation/interrogation; - services used during the call (e.g. call forwarding); - three party call indicator (including call waiting). 2.2.10 Charging information sent to MS: -information on the charging information sent e.g. to a coin box MS. 2.2.11 Tariff information: - tariff information and tariff switching indicator. 2.2.12 Location area: - location area where the MS was located at call set-up. 2.2.13 Fault type indication The registration of charging data should include a possibility to indicate that a fault situation occurred during a call which may reduce the reliability of the recording of charging data. ============================================================ Question 20/III - Tariff and accounting principles for services not covered by specific Questions (continuation of Question 21/III studied in 1985-1988) (This Question is to be studied in liaison with Study Group I.) Reasons for the study 1. From the studies on possible broad guiding principles for "value added" services undertaken during the 1985-1988 study period, it emerged that for a variety of reasons it was not feasible to establish general rules. 2. New services may require tariff and accounting principles different from those for existing services especially if existing services are used as the underlying transportation mechanism. 3. The WATTC-88 (Melbourne, 28 November - 9 December 1988) may produce directions for emerging new services which should require a rapid reaction of Study Group III in cooperation with the Study Groups responsible for defining service aspects. ============================================================ Question 21/III - Charging and accounting principles to be applied to the services offered by an Integrated Services Digital Network (ISDN) (continuation of Question 22/III studied in 1985-1988) (This Question must be studied in liaison with Study Groups I, II, VII, XI and XVIII, as necessary.) Reasons for the study Considering (a) that additional progress has been made in the field of services definition and of technical specifications which are the subject of various Recommendations in the I-, Q-, E-, M-, V- and X-Series; (b) that during the 1989-1992 study period countries: - will be implementing pure ISDN for some services, and/or -providing services via a combination of existing network(s) and ISDN; (c) that general charging and accounting principles are established for certain services and are the subject of D-Series Recommendations, that other principles have to be defined and established for services which will be implemented in a next step, and that there is a requirement for harmonization between existing and new Recommendations; (d) that existing Recommendations relating to ISDN charging and accounting principles will need to be updated as experience with services implementation is gained, What charging and accounting principles are appropriate to guide the development and implementation of services to be supported by ISDNs? This study will establish: -general charging and accounting principles for bearer services (in demand, reserved and permanent modes); - charging and accounting principles for teleservices; - charging and accounting principles for supplementary services;1 - charging and accounting principles for services in packet-mode; -principles regarding the establishment and exchange of international accounts taking into account the possibilities provided by the signalling system specific to ISDN (Signalling System No. 7).2,3 - - - - - - - - - - - - - - - 1 Giving priority to services that will be implemented during the current Plenary period. 2 Introducing, as necessary, appropriate modification to the provisions of Recommendation D.170. 3 In the following cases, the settlement of accounts between administrations may be based on additional information exchanged over the signalling system: a) charging and accounting data, generated at a location other than the billing point, may be exchanged between administrations together with identification of the call involved and of the administration originating the data; b) charging authorization at a location other than the billing point, e.g., for reverse charged calls and transferred charging, requires the exchange of signalling information; c) in case of transit switched calls, the terminating administration may receive a marking per call which identifies the originating administration. ============================================================ Question 22/III - General charging and accounting principles for non- voice services provided by interworking between the ISDN and existing public data networks (continuation of Question 22/III studied in 1985- 1988) (This Question should be studied in liaison with Study Groups I, VII, IX, XI and XVIII.) Reasons for the study Considering (a) that during the transition period, it is essential that administrations provide interworking between existing public data networks and the ISDN in order to continue providing users with non- voice services; (b) that administrations should be entitled to recover the costs associated with the interworking between the ISDN and other public networks, What charging and accounting principles are appropriate for non-voice services in the case of interworking between the ISDN and existing public data networks? The study of this Question should cover the establishment of charging and accounting principles applicable for remuneration of interworking facilities provided by the origin, transit or destination administration. ============================================================ Question 23/III - Tariff and accounting principles to be applied to permanent and reserved services within the ISDN (continuation of Question 22/III studied in 1985-1988) (This Question should be studied in liaison with Study Groups I, II, XI and XVIII as appropriate.) Reasons for the study Considering (a) that permanent and reserved services will be introduced by administrations early in the life of the ISDN; (b) that the existing D-Series Recommendations addressing the lease of international private telecommunications circuits provide some guidance for the use of permanent services within the ISDN; (c) that the existing D-Series Recommendations may not apply well to reserved services within the ISDN; (d) that a definition of "Reserved Services" in the ISDN is not yet finalized, What charging and accounting principles should be applied to permanent and reserved services within the ISDN? The study should include the following: i) the differentiation between service aspects and network aspects which may impact on ISDN charging and accounting, particularly in respect of the use of switched and semi-permanent connections to support reserved and permanent services; ii) examination of possible charging options beyond those offered for existing leased circuit services, as defined in the existing D- Series Recommendations; iii) alternative arrangements for the collection of charges (e.g. billing at either end of the services, both ends, or by an authorized third party); iv) appropriate international accounting arrangements for permanent and reserved services, within the ISDN, particularly as related to the study of items i), ii) and iii) above. ============================================================ Question 24/III - General charging and accounting principles to be applied to multipoint-to-point international telecommunication services via satellite (continuation of Question 23/III studies which have been examined during the 1985-1988 study period) (This Question must be studied in liaison with Study Group I.) Reasons for the study Considering (a) The following three main multidestination service categories: - one-way point to multipoint service; - one-way multipoint to point service; - two-way multiple access service; (b) the results achieved by the CCITT in the field of definition and charging for point to multipoint telecommunication services via satellite, services which are the subject of Recommendations in F and D- Series; (c) the progress expected in the field of definition for other multidestination telecommunication services, in particular for multipoint to point services; (d) the needs expressed by the customers in order to get, at regional as well as world level, multipoint to point services for data gathering, What charging and accounting principles are appropriate for one-way multipoint to point services via satellite?1 ============================================================ Question 25/III - General charging and accounting principles to be applied to two-way multiple access international telecommunication services via satellite (continuation of Question 23/III studies which have been examined during the 1985-1988 study period) (This Question must be studied in liaison with Study Group I.) Reasons for the study Considering (a) the following three main multidestination service categories: - one-way point to multipoint service, - one-way multipoint to point service, - two-way multiple access service; (b) the results achieved by the CCITT in the field of definition and charging for point to multipoint telecommunication services via satellite, services which are the subject of Recommendations in F and D- Series; (c) the progress expected in the field of definition for other multidestination telecommunication services, in particular for two-way multiple access services; (d) the needs expressed by the customers in order to get, at regional as well as world level, two-way multiple access services, What charging and accounting principles are appropriate for two-way multiple access services via satellite?1 ============================================================ Question 26/III - General consideration of the tariff and accounting provisions of D-Series Recommendations in the light of the content of the new International Telecommunication Regulations adopted by the WATTC-88 (Melbourne, 1988) Reasons for the study Considering (a) that in conformity with the provisions of Resolution No. 10 adopted by the Plenipotentiary Conference of Nairobi (1982), the WATTC-88 is "to consider proposals for a new regulatory framework to cater for the new situation in the field of new telecommunication services"; - - - - - - - - - - - - - - - 1 Either in introducing appropriate modifications to the provisions of Recommendation D.185 in conjunction with a possible adaptation of the Recommendation or in developing a new Recommendation to cover the provision of that new service. (b) that the WATTC-88 (Melbourne, 28 November - 9 December 1988) adopted new International Telecommunication Regulations; (c) that these Regulations contain provisions concerning tariffs and accounting for international telecommunication services, which are designed to replace those contained in the present Telegraph and Telephone Regulations (1973); (d) that the provisions of the new Regulations could affect the tariff and accounting methods and/or principles contained in the D-Series Recommendations of the CCITT, It is advisable to review the tariff and accounting provisions of the D- Series Recommendations of the CCITT with a view to amending them if necessary in the light of the new situation. ============================================================ Question 27/III - Cost studies for determining the basic tariff components for telecommunication services (telegraph, telephone, telex, data, etc.) (continuation of Question 27/III studied in 1985-1988) (Permanent Question; however, the permanent character of the Question does not imply the obligation to begin a new study during each study period.) Cost studies for fixing the basic components of tariffs (for international accounting purposes) in telecommunications services (data, telegraph, telephone, telex, etc.). The studies are to be carried out on a regional basis by the regional groups set up by the IVth Plenary Assembly of the CCITT to deal with international tariffs, namely: - Regional Tariff Group for Africa (TAF); - Regional Tariff Group for Latin America (TAL); - Regional Tariff Group for Asia and Oceania (TAS); - Regional Tariff Group for Europe and the Mediterranean Basin (TEUREM). ============================================================ Question 28/III - Cost studies for determining the basic tariff components in providing circuits for: a) sound programme transmissions, b) television programme transmissions, c) leasing of sound programme circuits, d) leasing of television programme circuits. (continuation of Question 28/III studied in 1985-1988) (Permanent Question; however, the permanent character of the Question does not imply the obligation to begin a new study during each study period.) These studies are to be carried out on a regional basis by the regional tariff groups. ============================================================ Question 29/III - Methodology to be followed for determination of costs and establishment of national tariffs (continuation of Question 29/III studied in 1985-1988) Reasons for the study Considering (a) the increase in the cost of network development and in the obsolescence of telecommunication equipment as a result of rapid technological progress; (b) the steadily increasing share of expenditure on network operation; (c) the fact that an appropriate tariff policy determines the equilibrium of administration's budgets, What are the practical methods for determining the cost of telecommunication facilities and establishing appropriate tariffs, particularly for use by administrations of developing countries? Note 1 - The study of this Question should encompass national tariffs, and the results of the studies should preferably be published in the form of a manual. Note 2 - Supplement No.2 to the D-Series Recommendations could be taken as a basis for the study of this Question. Note 3 - The studies conducted during the 1985-1988 study period resulted in the preparation of Supplement No.3 to Fascicle II.1 of Volume II of the Blue Book. The cost determination model proposed and the general principles for the establishment of public tariffs relate to the telephone and telex services only; further studies are required in order to extend the model and principles to other services, and in particular the public telegram service and specialized networks. ============================================================ Question 30/III - Terms and definitions for the Recommendations dealing with tariff and accounting principles (continuation of Question 26/III studied in 1985-1988) What new and revised definitions are needed to define adequately the terms used in existing and new Recommendations dealing with tariff and accounting principles? Reasons for the study Considering that it is necessary (a) to establish new definitions of terms where none currently exist; (b) to standardize existing definitions of some terms; (c) to recognize in certain cases that some definitions used by Study Group III in its deliberations may not always be applicable to terminology utilized by other Study Groups, it is proposed to continue studies consistent with the principles set out in Recommendation D.000 relating to terms and definitions for D-Series Recommendations. In the study of this Question particular attention should be paid to the following points: 1. The terms in the Recommendations dealing with tariff and accounting principles are often not defined as part of the Recommendations. 2. Certain terms are defined only in the context of a specific Recommendation and may not be applicable to all Recommendations dealing with tariff and accounting principles. 3. There is a need to develop a single authoritative source of Study Group III terminology for use in Recommendations dealing with tariff and accounting principles. 4. It is desirable to coordinate the work on definitions between the different CCITT Study Groups. 5. Often terms have been used inconsistently, more than one term being used to describe a single concept or more than one definition to describe a single term. ============================================================ Question 31/III - Amendments and additions to be made to Recommendation C.1 relating to telecommunication statistics (This Question is to be studied in liaison with Study Groups I and II.) Reasons for the study Recognizing - that administrations and other organizations request statistical data from the ITU to obtain information which may be useful to them in modifying existing services or in offering newly emerging services between member countries; - that CCITT Recommendation C.1 has not been revised since 1980; - that revision of Recommendation C.1 may be necessary due to the fact that a number of administrations no longer supply certain parameters and that new parameters for new services are henceforth required for the purposes of forecasting, etc. The data collected and the layout of the Yearbook could be changed in order to reflect actual telecommunications growth.