ITU-T X 122-1998 Numbering Plan Interworking for the E 164 and X 121 Numbering Plans - Series X Data Networks and Open System Communication Public Data Networks - Network Aspects (.pdf

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1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU E.166lX.122 SERIES E: TELEPHONE NETWORK AND ISDN Operation, numbering, routing and mobile services - International operation - Numbering plan of the international telephone service SERIES X: DATA NETWORKS AND

2、 OPEN SYSTEM CO M M U N I CAT I O N Public data networks - Network aspects (03/98) Numbering plan interworking for the E.164 and X.121 numbering plans ITU-T Recommendation E. 1661X. 122 (Previously CCITT Recommendation) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed

3、by Information Handling ServicesITU-T E-SERIES RECOMMENDATIONS TELEPHONE NETWORK AND ISDN OPERATION, NUMBERING, ROUTING AND MOBILE SERVICES INTERNATIONAL OPERATION Definitions General provisions concerning Administrations General provisions concerning users Operation of international telephone servi

4、ces E.100-E.229 E. 1 OO-E. 103 E. 104-E. 1 19 E. 1 20-E. 1 39 E. 140-E. 159 Numbering plan of the international telephone service E. 1 60-E.169 International routing plan Tones in national signalling systems Maritime mobile service and public land mobile service E. 170-E. 179 E. 180-E. 199 E.200-E.2

5、29 E.230-E.299 OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELEPHONE SERVICE Charging in the international telephone service Procedures for remuneration of Administrations for facilities made available Measuring and recording call durations for accounting purposes

6、 E ,230-E ,249 E.250-E.259 E.260-E.269 Establishment and exchange of international accounts E.270-E.299 E. 300-E ,329 UTILIZATION OF THE INTERNATIONAL TELEPHONE NETWORK FOR NON- TE LEP HO NY APPLICATIONS General Phototelegraphy E.300-E.319 E. 320-E ,329 ISDN PROVISIONS CONCERNING USERS E.330-E.399 Q

7、UALITY 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.899 OB J ECTIVES AND DEPEN DAB I LITY PLAN N I NG For further details, please refer to ITU-T List of Recommend

8、ations. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesITU-T RECOMMENDATION E.l66/X. 122 NUMBERING PLAN INTERWORKING FOR THE E.164 AND X.121 NUMBERING PLANS Summary This Recommendation defines the procedures applicable for the purpose

9、of numbering plan interworking between networks which use the E. 164 numbering plan and networks which use the X.121 numbering plan. The principles for interworking between the E.164 and X.121 numbering plans covered in this Recommendation are illustrated by various examples of packet mode calls. Al

10、though both the escape code method and the Numbering Plan Identifier (NPI) method are described, the recommended solution is use of the NPI method. Source ITU-T Recommendation E.166/X.122 was revised by ITU-T Study Groups 2 and 7 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure

11、 on the 8th of October 1996. Due to some legibility problems, a new version was output on the 18th of March 1998 with enhanced figures, but without any content or editorial modification. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesF

12、OREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions a

13、nd issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendatio

14、ns 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 (Helsinki, March 1-12, 1993). In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborati

15、ve basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form

16、 or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation E.166K.122 (03/98) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesCONTENTS Page 1 2 3 4 5 6

17、 6.1 6.2 6.3 6.4 6.5 6.6 6.7 7 7.1 7.2 7.3 8 Introduction Scope References Definitions Abbreviations . Interworking . Numbering plans 6.1.1 Escape codes . 6.1.2 Prefixes 6.1.3 Allocation of a DNIC to an ISDN or PSTN Methods 6.2.1 Dial-in method 6.2.2 Escape code method 6.2.3 NPI method . Subscriber

18、dialling procedures . 6.3.2 Double stage dialling . 6.3.1 Single stage dialling Escape code method versus NPI method Reconciliation between the escape code method and the NPI method Internetwork implementation . Man-machine interface procedures Interworking diagrams Conventions used in the interwork

19、ing diagrams (Figures 2 through 28) . Index of interworking diagrams . 7.2.1 Section A: Scenarios for interworking 7.2.2 Section B: Bearer capability interworking that requires no numbering plan interworking 7.2.3 7.2.4 Section D: Interworking with terminals that have dual numbers Interworking diagr

20、ams Section C: Numbering plan interworking . Recommendation history 1 1 4 9 9 10 10 10 11 11 12 40 . Recommendation E.166K.122 (03/98) 111 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesCOPYRIGHT International Telecommunications Union/

21、ITU TelecommunicationsLicensed by Information Handling ServicesRecommendation E.166/X.122 NUMBERING PLAN INTERWORKING FOR THE E.164 AND X.121 NUMBERING PLANS (revised in 1996) 1 Introduction Various public networks such as Integrated Services Digital Networks (ISDNs) and Public Switched Telephone Ne

22、tworks (PSTNs) utilize the E. 164 numbering plan, whilst Packet Switched Public Data Networks (PSPDNs) are generally numbered under the X. 121 numbering plan. A call from an ISDN (or PSTN) to a PSPDN, a PSPDN to an ISDN and calls routed through networks using a different numbering plan to that of th

23、e originating or destination network are examples of the need for numbering plan interworking. Numbering plan interworking is a fundamental requirement for the successful completion of calls between networks utilizing different numbering plans. This Recommendation defines the general procedures appl

24、icable to numbering plan interworking between: - ISDNs and PSPDNs; - ISDNs and PSTNs; and - PSPDNs and PSTNs. The numbering and addressing principles for PSTNdISDNs are described in Recommendation 1.330. The numbering principles for public data networks are defined in Recommendation X. 121. 2 Scope

25、2.1 The scope of this Recommendation is to define the procedures applicable for the purpose of numbering plan interworking between networks which use the E. 164 numbering plan and networks which use the X. 12 1 numbering plan. 2.2 Although both the E. 164 and X. 121 numbering plans accommodate both

26、circuit switched and packet switched networks, the principles for interworking between the E.164 and X.121 numbering plans covered in this Recommendation are illustrated by various examples which involve only packet mode calls. Although not illustrated, the numbering plan interworking principles, us

27、ing the Numbering Plan Identifier (NPI) method are also applicable to frame relay networks. 2.3 Interworking involving two or more networks is included in the scope of this Recommendation. 2.4 This Recommendation applies to numbering plan interworking across international boundaries. Its applicabili

28、ty to calls within a single country is a national matter. 2.5 The sample call flows shown in the figures are from terminal to terminal. For those situations that involve escape codes, it should be noted that the interworking arrangements within a national network are a national matter. 2.6 The appli

29、cation of this Recommendation includes the following numbering plan interworking and bearer capability interworking scenarios: 4 calls from/to a speech terminal on an ISDN, to/from a voice terminal on a PSTN (see Figures 2 and 3); Recommendation E.166K.122 (03/98) 1 COPYRIGHT International Telecommu

30、nications Union/ITU TelecommunicationsLicensed by Information Handling Servicescalls from/to an X.25 terminal on an ISDN, to/from an X.25 terminal using X.32 procedures on a PSTN (see Figures 4 and 5); calls from/to an X.25 terminal on an ISDN, to/from an X.25 terminal on another ISDN (see Figure 6)

31、; calls from/to an X.25 terminal on a PSPDN, to/from an X.25 terminal using X.32 procedures on a PSTN (see Figures 7, 8,27 and 28); calls from/to an X.25 terminal on a PSPDN, to/from an X.25 terminal using X.3 1 procedures (BC = PS) on an ISDN (see Figures 11 and 12); calls from/to an X.25 terminal

32、on a PSPDN utilizing an ISDN packet switch as a transit network for calls to/from an X.25 terminal on a PSPDN (see Figure 13); calls from/to an X.25 terminal using X.31 procedures (BC = PS) on an ISDN utilizing a PSPDN as a transit network for calls to/from an X.25 terminal using X.31 procedures (BC

33、 = PS) on another ISDN (see Figure 16); calls from/to an X.25 terminal using X.31 procedures (BC = PS) on an ISDN utilizing a PSPDN as a transit network for calls to/from an X.25 terminal using X.31 procedures (BC = 64) on another ISDN (see Figures 14, 15, 17 and 18); calls from/to an X.25 terminal

34、using X.31 procedures (BC = PS) on an ISDN utilizing a PSPDN as a transit network for calls to/from an X.25 terminal using X.32 procedures on a PSTN (see Figures 19,20,21 and 22); calls from/to an X.25 terminal using X.31 procedures (BC = PS) on an ISDN utilizing a PSPDN and an ISDN packet switch as

35、 transit networks for calls to/from an X.25 terminal using X.32 procedures on a PSTN (see Figures 23 and 24); calls from/to an X.25 terminal on a PSPDN to/from an X.25 terminal using X.3 1 procedures (BC = 64) on an ISDN (see Figures 9, 10,25 and 26). NOTE - None of the scenarios listed above specif

36、ically address character mode Data Terminal Equipment (DTE) (i.e. X.28 mode) access to a Packet Assembly/Disassembly (PAD) nor Group 3 FAX (i.e. X.38 mode) access to a Facsimile Packet Assembly/Disassembly (FPAD). The escape code method scenarios for X.25 terminals are in most cases applicable to X.

37、28 and/or X.38 terminals. However, this is not the case for the NPI method scenarios until a Numbering Plan Identifier (NP1)-like facility is defined in Recommendations X.28 andor X.38. 3 References 3.1 - This Recommendation is related to and is compatible with the following Recommendations: ITU-T R

38、ecommendation E. 160 (1 993), Definitions relating to national and international num bering plans. CCITT Recommendation E.164 (1.331) (1991), Numberingplan for the ISDN era. CCITT Recommendation E. 165 (1988), Timetable for coordinated implementation of the full capability of the numberingplan for t

39、he ISDN era (Recommendation E.164). ITU-T Recommendation E.165.1 (1996), The use of escape code “O“ within the E.164 numberingplan during the transition period to implementation of NPI mechanism. CCITT Recommendation E. 170 (1 992), Traffic routing. CCITT Recommendation E. 172 (1 992), ISDN routingp

40、lan. - - - - - 2 Recommendation E.166K.122 (03/98) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesCCITT Recommendation E. 173 (1 99 i), Routing plan for interconnection between public land mobile networlts and fixed terminal networlts.

41、 CCITT Recommendation 1.330 (1 9SS), ISDN numbering and addressingprinciples. ITU-T Recommendations Q.761 to Q.764 (1993), Integrated services digital network user part. ITU-T Recommendation Q.93 1 (1993), ISDN user-network interface layer 3 specification for basic call control. ITU-T Recommendation

42、 X.25 (1 996), Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to public data networlts by dedicated circuit. ITU-T Recommendation X.28 (1 993), DTE/DCE interface for start-stop mode data terminal e

43、quipment accessing the packet assembly/disassembly facility (PAD) in a public data network situated in the same country. ITU-T Recommendation X.3 1 (1995), Support of packet mode terminal equipment by an ISDN. ITU-T Recommendation X.32 (1996), Interface between Data Terminal Equipment (DTE) and Data

44、 Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and accessing a packet switched public data network through a public switched telephone network or an integrated services digital network or a circuit switchedpublic data network. ITU-T Recommendation X.38 (1996), G3 fac

45、simile equipment/DCE interface for G3 facsimile equipment accessing the Facsimile Packet Assembly/Disassembly facility (FPAD) in a public data network situated in the same country. ITU-T Recommendation X.75 (1 993), Packet-switched signalling system between public networlts providing data transmissi

46、on services. CCITT Recommendation X. 1 1 O (1 988), International routing principles and routing plan forpublic data networlts. ITU-T Recommendation X. 121 (1996), International numbering plan for public data networlts. ITU-T Recommendation X. 123 (1996), Mapping between escape codes and TOA/NPI for

47、 E. 164/X 121 numbering plan interworking during the transition period. CCITT Recommendation X.300 (1 988), General principles for interworking between public networlts and between public networlts, and other networlts for the provision of data transmission services. ITU-T Recommendation X.301 (1993

48、), Description of general arrangements for call control within a subnetwork and between subnetworlts for the provision of data transmission services. 4 Definitions Within the integrated service and dedicated network environment, the terms used for all networks and services must be compatible and con

49、sistent. A list of terms and their definitions relating to numbering are contained in Recommendations E. 160, E. 164, and X. 12 1. Additionally, the application of some of the definitions is found in clause 6. Recommendation E.166K.122 (03/98) 3 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services5 Abbreviations The following abbreviations are used within this Recommendation: 64 AF AU BC CRP cs DCE DNIC DTE EC FPAD ICP ISDN NPI ONSD PAD PDN PH PS PSPDN PSTN ROA SS No. 7 64 kbits/s Address Field Access Unit Bearer Capability Call Requ