1、 International Telecommunication Union ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU WORLD TELECOMMUNICATION STANDARDIZATION ASSEMBLY Johannesburg, 21-30 October 2008 Resolution 65 Calling party number delivery FOREWORD The International Telecommunication Union (ITU) is the United Nations sp
2、ecialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication 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 the
3、m with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (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. ITU 2009 All rights r
4、eserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. WTSA-08 Resolution 65 1 RESOLUTION 65 Calling party number delivery (Johannesburg, 2008) The World Telecommunication Standardization Assembly (Johannesburg, 2008), concerned
5、a) that there appears to be a trend to suppress the transmission across international boundaries of calling party identification, in particular the country code and the national destination code; b) that such practices have an unfavorable effect on security and economic issues; c) that work in Study
6、 Group 2 on this topic needs to be expedited, noting relevant Recommendations of the ITU Telecommunication Standardization Sector (ITU-T), in particular: i) ITU-T Q.731.x-series concerning stage 3 descriptions for number identification supplementary services using Signalling System No. 7; ii) ITU-T
7、Q.731.7, Stage 3 description for number identification supplementary services using Signalling System No. 7: Malicious call identification (MCID); iii) ITU-T I.251.3, Number identification supplementary services: Calling Line Identification Presentation; iv) ITU-T I.251.4, Number identification supp
8、lementary services: Calling Line Identification Restriction; v) ITU-T I.251.7, Number identification supplementary services: Malicious call identification; vi) ITU-T E.164, The international public telecommunication numbering plan; vii) ITU-T Q.764, Signalling System No. 7 ISDN User Part signalling
9、procedures; viii) ITU-T Q.1912.5, Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN User Part, resolves 1 that international calling party number delivery shall, consistent with technical capabilities and national legal and regulatory framewo
10、rks, be provided based on the relevant ITU-T Recommendations; 2 that the delivered calling party numbers shall, consistent with technical capabilities and national legal and regulatory frameworks, be prefixed with country codes to identify in which country the calls are originated before they are de
11、livered from an originating country to a receiving country; 3 that, in addition to the country code, the delivered calling party number shall, consistent with technical capabilities and national legal and regulatory frameworks, include the national destination code, or sufficient information to allo
12、w proper billing and accounting, for each call; 4 that the calling party number shall, consistent with technical capabilities and national legal and regulatory frameworks, be transmitted transparently by transit networks (including hubs), 2 WTSA-08 Resolution 65 instructs 1 the concerned study group
13、s, in particular Study Group 2, to expedite work on Recommendations that would provide additional detail and guidance for the implementation of, at least, the principles listed above; 2 the Director of the Telecommunication Standardization Bureau to report on the progress achieved by the study groups in implementing this resolution, which is intended to improve security and minimize fraud, and minimize technical harm as called for by Article 42 of the Constitution.
