1、CCITT RECMN*D.220 91 48b2591 05b0633 3 9 INTERNATIONAL TELECOMMUNICATION UNION CCITT D.220 THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE GENERAL TARIFF PRINCIPLES CHARGING AND ACCOUNTING IN INTERNATIONAL TELECOMMUNICATIONS SERVICES CHARGING AND ACCOUNTING PRINCIPLES TO BE APPLIED
2、TO INTERNATIONAL PROVIDED OVER THE INTEGRATED SERVICES DIGITAL NETWORK (ISDN) CIRCUIT-MODE DEMAND BEARER SERVICES Recommendation D.220 CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE GENERAL TARIFF PRINCIPLES NTERNATIONAL TELECOMMUNICATION UNION D.220 CHARGING AND ACCOUNTING I
3、N INTERNATIONAL TELECOMMUNICATIONS SERVICES CHARGING AND ACCOUNTING PRINCIPLES TO BE APPLIED TO INTERNATIONAL PROVIDED OVER THE INTEGRATED SERVICES DIGITAL NETWORK (ISDN) CIRCUIT-MODE DEMAND BEARER SERVICES Recommendation D.220 Geneva, 1991 CCITT RECMN*D*220 93 4862593 0560635 7 FOREWORD The CCITT (
4、the International Telegraph and Telephone Consultative Committee) is a permanent organ of the Intemational Telecommunication Union (ITU). CCITT is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on
5、 a worldwide basis. The Plenary Assembly of CCIT which meets every four years, establishes the topics for study and approves Recommendations prepared by its Study Groups. The approval of Recommendations by the members of CCITT between Plenary Assemblies is covered by the procedure laid down in CCITT
6、 Resolution No. 2 (Melbourne, 1988). Recommendation D.220 was prepared by Study Group III and was approved under the Resolution No. 2 procedure on the 22 of March 1991. CCIT NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication Admi
7、nistration and a recognized private operating agency. O ITU 1991 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. CCITT RECMN*D.220 9
8、1 48b259L 05bOb3b 9 = Recommendation D.220 CHARGING AND ACCOUNTING PRINCIPLES TO BE APPLIED TO INTERNATIONAL THE INTEGRATED SERVICES DIGITAL NETWORK (ISDN) (Melbourne, 1988, revised 1990) CIRCUIT-MODE DEMAND BEARER SERVICES PROVIDED OVER Preamble This Recommendation sets out the general principles f
9、or charging and accounting to be applied by Administrations for the provision of international circuit-mode demand bearer services provided over the ISDN. These services are defined in the relevant CCITT Recommendations. 1 General principles require the same network resources and/or functions to pro
10、vide the customer with the service requested. accounting rates may depend on the costs of those resources. principles. Unique aspects of the services are also noted in Annex A. In principle, there should be no charging and accounting discrimination between bearer services which When the network reso
11、urces required to provide bearer services are different, the collection charges and The services covered by this Recommendation are listed in Annex A and are subject to the same general 2 Collection charges 2.1 Collection charges should be set in accordance with the bearer service requested by the c
12、ustomer. In the event that Administrations elect to provide a higher capacity connection to meet that request, the customer shall be charged on the basis of the connection type corresponding to the requested service. 2.2 2.2.1 than those for a service requiring 3.1 kHz audio; 2.2.2 service requiring
13、 speech only). 2.3 when the information channel is open for communicationl). The network resources necessary to support the requested services may be different, for example: the basic utilization charges for a service requiring 64 kbit/s unrestricted may in principle be at a rate higher the basic ut
14、ilization charges for a service requiring 3.1 kHz audio may in principle be higher than those for a Measurement of a call for charging purposes should in principle be based on duration and should commence 3 Accounting 3.1 Administrations should, by agreement, establish the accounting rate) applicabl
15、e in a given relation. The accounting rate should be divided into terminal shares payable to the Administrations of the terminal countries and, where applicable, into transit shares payable to the transit Administration. These shares should be established in accordance with the relevant provisions o
16、f the Administrative Regulations l and the CCITT Recommendations. 3.2 Accounting rates should, in principle, relate to the network resources and functions required to provide the service requested. In exceptional cases when the requested facilities are not available, and a higher grade facility is u
17、tilized by Administrations, accounting should be based on the facility used. This is for hither study. Recommendation D.220 1 . CCITT RECMN*D.220 91 W 4862.591 0560637 O 3.3 Measurement of traffic for accounting purposes should in principle be based on duration and take into account other relevant C
18、CITT Recommendations. However, Administrations may agree to consider specific accounting to recover the costs associated with short duration calls). ANNEX A (to Recommendation D.220) Categories of circuit-mode bearer services a) b) c) d) e) f) Speech: no unique aspects foreseen; 3.1 kHz: no unique a
19、spects foreseen; 64 kbit/s unrestricted: no unique aspects foreseen; 7 kHz: for further study; Alternate speech/64 kbit/s unrestricted: for further study; 384 kbit/s unrestricted: the call set up charges for this service may be more significant than for the other services (for further study). Ref er en c e il Final Acts of the World Administrative Telegraph and Telephone Conference, International Telecommunication Regulations, ITU, Melbourne, 1988. This is for futher study. 2 Recommendation D.220
