1、INTERNATIONAL TELECOMMUNICATION UNION ITUmT TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU E.165.1 SERIES E: TELEPHONE NETWORK AND ISDN Operation, numbering, routing and mobile services - International operation - Numbering plan of the international telephone service (1 0196) Use of escape code “O“
2、 within the EA64 numbering plan during the transition period to implementation of NPI mechanism ITU-T Recommendation E.165.1 (Previously CCITT Recommendation) ITU-T E-SERIES RECOMMENDATIONS TELEPHONE NETWORK AND ISDN 3PERATION, NUMBERING, ROUTING AND MOBILE SERVICES NTERNATIONAL OPERATION Definition
3、s General provisions concerning Administrations General provisions concerning users Operation of international telephone services E.100-E.229 E. 1 OO-E. 1 03 E.104-E.119 E.120-E.139 E.140-E.159 Numbering plan of the international telephone service E.160-E.169 International routing plan Tones in nati
4、onal signalling systems Maritime mobile service and public land mobile service E. 170-E. 179 E. 180-E. 199 E.200-E.229 OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELEPHONE SERVICE E.230-E.299 Charging in the international telephone service Procedures for remunera
5、tion of Administrations for facilities made available Measuring and recording call durations for accounting purposes Establishment and exchange of international accounts E.230-E.249 E.250-E.259 E.260-E.269 E.270-E.299 UTILIZATION OF THE INTERNATIONAL TELEPHONE NETWORK FOR NON- TELEPHONY APPLICATIONS
6、 E. 300-E. 329 General E.300-E.319 Phototelegraphy E.320-E.329 ISDN PROVISIONS CONCERNING USERS E.330-E.399 QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING NETWORK MANAGEMENT E.400-E.489 TRAFFIC ENGINEERING E.490-E.799 QUALITY OF TELECOMMUNICATION SERVICES: CONCEPTS, MODELS, E.800-E.8
7、99 OBJECTIVES AND DEPENDABILITY PLANNING For further details, please refer to ITU-T List of Recommendations. STD.1TLt-T RECMN E-Lb5.L-ENGL L77b 9 hb257L ObZbCL3 2h5 ITU-T RECOMMENDATION E.165.1 USE OF ESCAPE CODE “O“ WITHIN THE E.164 NUMBERING PLAN DURING THE TRANSITION PERIOD TO IMPLEMENTATION OF N
8、PI MECHANISM Summary This Recommendation describes the use of escape code “O“ within the E.164 numbering plan in order to facilitate number plan interworking during the transition period to implementation of the NPI mechanism. Source ITU-T Recommendation E.165.1 was prepared by ITU-T Study Group 2 (
9、1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 8th of October 1996. STD-ITU-T RECMN E*LbS-L-ENGL L99b 48b257L Ib2bOL4 181 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommun
10、ication Standardization Sector (ITU-T) is a permanent organ of the ITU. The 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 Standardizatio
11、n Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Hel
12、sinki, March 1-12, 1993). In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administrationyy is used for conciseness to indicate both a telecommunicati
13、on administration and a recognized operating agency. O ITU 1997 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. 11 Recommendation E.
14、165.1 (10/96) CONTENTS Introduction References Use of escape code “O“ within the E. 164 numbering plan . Page 1 1 1 . Recommendation E.165.1 (10/96) 111 STD-ITU-T RECMN E.Lb5.1-ENGL 177b 48b2571 Ob2bOLb T54 Recommendation E.165.1 USE OF ESCAPE CODE “O“ WITHIN THE E.164 NUMBERING PLAN DURING THE TRAN
15、SITION PERIOD TO IMPLEMENTATION OF NPI MECHANISM (Geneva, 1996) 1 Introduction This Recommendation describes the use of escape code “O“ within the E.164 numbering plan in order to facilitate number plan intenvorking during the transition period to implementation of the NPI mechanism. Recommendation
16、E.164 (1991) provides for escape code “O“ to be used to indicate that the digits following the escape code are digits according to the X.121 numbering plan. Recommendation E. 166K. 122 describes numbering plan intenvorking using either the escape code method or the NPI method. The recommended method
17、 and long-tem requirement is for the use of NPI in place of the present use of escape codes. Only the NPI mechanism has the capability to carry a 15-digit E. 164 number in the X.25 and X.75 call Set-up packets. 2 References The following Recommendations and other references contain provision which,
18、through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision: all users of this Recommendation are therefore encouraged to investigate the possibility of a
19、pplying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. - - CCITT Recommendation E. 164 (1 991), Numberingplan for the ISDN era. CCITT Recommendation E. 165 (1 SSS), Timetable for coordinate
20、d implementation of the full capability of the numbering plan for the ISDN era (Recommendation E. 164). ITU-T Recommendation E. 166X. 122 (1 996), Numbering plan interworking for the E. I64 andX 121 numberingplans. ITU-T Recommendation X. 123 (1996), Mapping between escape codes and TOMNPI for E. I6
21、4/X 121 numbering plan interworking during the transition period. - - 3 The use of digit “O“ (zero) as an escape code has been provided within the E. 164 numbering plan to enable numbering plan intenvorking and its use is described in Recommendation E. 166K 122. The escape code method is a temporary
22、 arrangement to facilitate intenvorking prior to the implementation of Numbering Plan Identifier (NPI) based intenvorking solutions. It should be carefully noted that due to the demand for country codes within the E.164 numbering plan, it has been identified that it will be necessary to recover esca
23、pe code “O“. The use of escape code “O“ within in the E.164 numbering plan will be discontinued at 2359 hours (UTC), 3 1 December 2000. Use of escape code, “O“ within the E.164 numbering plan Recommendation E.165.1 (10/96) 1 Accordingly, packet mode terminals on networks numbered under E. 164 should
24、 evolve at the earliest opportunity towards support of the NPI mechanism to ensure an ongoing interworking capability beyond the time at which the E. 164 escape “O“ is discontinued. Also signalling protocols being developedimplemented should not utilize the escape code method for signalling that the
25、 number is from a different numbering plan. 2 Recommendation E.165.1 (10/96) ;cries A eries B eries C eries D eries E eries F eries G leries H leries I leries J ieries K ;eries L ;eries M series N series O Series P series Q series R Series S Series T Series U Series V Series X Series Z ITU-T RECOMME
26、NDATIONS SERIES Organization of the work of the ITU-T Means of expression General telecommunication statistics General tariff principles Telephone network and ISDN Non-telephone telecommunication services Transmission systems and media Transmission of non-telephone signals Integrated services digita
27、l network Transmission of sound-programme and television signals Protection against interference Construction, installation and protection of cables and other elements of outside plant Maintenance: intemational transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maint
28、enance: international sound-programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminal equipment and protocols for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communication Programming languages *10006* Printed in Switzerland Geneva, 1997
