1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T D.201TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (12/2002) SERIES D: GENERAL TARIFF PRINCIPLES General tariff principles Settlement of international telecommunication balances of accounts General principles regarding call-back practicesITU-T Recommend
2、ation D.201 ITU-T D-SERIES RECOMMENDATIONS GENERAL TARIFF PRINCIPLES TERMS AND DEFINITIONS D.0 GENERAL TARIFF PRINCIPLES Private leased telecommunication facilities D.1D.9 Tariff principles applying to data communication services over dedicated public data networks D.10D.39 Charging and accounting i
3、n the international public telegram service D.40D.44 Charging and accounting in the international telemessage service D.45D.49 Principles applicable to GII-Internet D.50D.59 Charging and accounting in the international telex service D.60D.69 Charging and accounting in the international facsimile ser
4、vice D.70D.75 Charging and accounting in the international videotex service D.76D.79 Charging and accounting in the international phototelegraph service D.80D.89 Charging and accounting in the mobile services D.90D.99 Charging and accounting in the international telephone service D.100D.159 Drawing
5、up and exchange of international telephone and telex accounts D.160D.179 International sound- and television-programme transmissions D.180D.184 Charging and accounting for international satellite services D.185D.189 Transmission of monthly international accounting information D.190D.191 Service and
6、privilege telecommunications D.192D.195 Settlement of international telecommunication balances of accounts D.196D.209 Charging and accounting principles for international telecommunication services provided over the ISDN D.210D.279 Charging and accounting principles for universal personal telecommun
7、ication D.280D.284 Charging and accounting principles for intelligent network supported services D.285D.299 RECOMMENDATIONS FOR REGIONAL APPLICATION Recommendations applicable in Europe and the Mediterranean Basin D.300D.399 Recommendations applicable in Latin America D.400D.499 Recommendations appl
8、icable in Asia and Oceania D.500D.599 Recommendations applicable to the African Region D.600D.699 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. D.201 (12/2002) i ITU-T Recommendation D.201 General principles regarding call-back practices Summary This Recommendati
9、on sets out principles for Administrations to follow while providing or permitting the provision of call-back practices contained in Resolution 21 of Minneapolis, 1998. Study Group 3 has decided to modify this Recommendation in adding a definition of call-back. Source ITU-T Recommendation D.201 was
10、revised by ITU-T Study Group 3 (2001-2004) and approved under the WTSA Resolution 1 procedure on 13 December 2002. ii ITU-T Rec. D.201 (12/2002) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunica
11、tion Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly
12、(WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fa
13、ll within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY
14、RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by
15、 ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that th
16、is may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2003 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. D.201 (12/2002) 1 ITU-T Recom
17、mendation D.201 General principles regarding call-back practices Introduction Definition Call-back is an alternative calling procedure where the call is initiated in the country of the caller, but call set-up and billing data collection take place in the network of a country other than the home coun
18、try network of the caller. Context Owing to the fact that the telecommunication industry has witnessed considerable advances, it has enabled Administrations to offer various options to customers, including call-back practices. Some of these practices are considered illegal by some Administrations, w
19、hile they are accepted in the more liberalized countries and markets.1This Recommendation sets out principles for Administrations to follow while providing or permitting the provision of call-back practices, taking into consideration the guidelines contained in Resolution 21 of Kyoto 1994, Resolutio
20、n 29 of WTSC-96, Resolution 22 of WTDC-98, Resolution Plen/5 of Minneapolis 1998, and Resolution 21 of Marrakesh 2002. The national laws and sovereignty of all Administrations should be respected. Therefore it is recommended as follows: Recommendation 1) The ITU-T is to continue to publish and updat
21、e the list of those Administrations which have prohibited or allowed the call-back practice, and have informed the ITU accordingly. 2) Within the limitations and constraints of their national laws or regulations, all practical reasonable measures should be taken by Administrations, where call-back p
22、ractices are permitted, to restrict the provision of call-back practices to those Administrations where it is prohibited. This should at least include publishing the ITU list of those Member States where call-back practices are prohibited. 3) Member States that prohibit the call-back practices shoul
23、d at least: Continue to inform the ITU of such prohibition and request the ITU list to be updated. Take all reasonable measures to prohibit the call-back practices within their territories. _ 1As of 6 May 2002, 106 Member States of the Union prohibit such practice in their territories, while 32 Memb
24、er States announced that they permit such practice in their countries. Source: ITU (www.itu.int/itudoc/itu-t/com3/callback/position.html). Printed in Switzerland Geneva, 2003 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, symbols
25、, classification Series C General telecommunication statistics Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and
26、networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables
27、 and other elements of outside plant Series M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring e
28、quipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure and Internet protocol aspects Series Z Languages and general software aspects for telecommunication systems
