1、STD.ITU-T RECMN X.123-ENGL L776 48b25L b22552 930 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.123 (1 0/96) SERIES X: DATA NETWORKS AND OPEN SYSTEM COM M U N I CATI ON Public data networks - Network aspects Mapping between escape codes and TONNPI for
2、E.1641X.121 numbering plan interworking during the transition period ITU-T Recommendation X. 123 (Previously “CCITT Recommendation“) STDmITU-T RECMN X.LZ3-ENGL L97b q8b2591 Ob22553 877 ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATION ir Services and facilities I Interfaces
3、X. 1 -X. 19 X.20-X.49 Transmission, signalling and switching X.50-X.89 Ne as 9 Maintenance Administrative arrangements Model and notation Service definitions Connection-mode protocol specifications Connectionless-mode protocol specification PICS proformas Protocol Identification Security Protocols L
4、ayer Managed Objects Conformance testing General Satellite data transmission systems MESSAGE HANDLING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPECTS OPEN SYSTEM INTERCONNECTION INTERWORKTNG BETWEEN NETWORKS Networkmg Efficiency Naming, Addressing and Registration Abstract Syntax Notation One (A
5、SN. 1) Systems Management framework and architecture Management Communication Service and Protocol OS1 MANAGEMENT , Structure of Management Information Management functions SECURITY OS1 APPLICATIONS Commitment, Concurrency and Recovery Transaction processing Remote operations OPEN DISTRIBUTED PROCES
6、SING x. 1 50-x. 179 X.180-X. 199 X.200-X.299 X.200-X.209 X.210-X.219 X.220-X.229 X.230-X.239 X.240-X.259 X.260-X.269 X.270-X.279 X.280-X.289 X.290-X.299 X.300-X.399 X.300-X.349 X.350-X.399 X.400-X.499 x.500-x.599 X.600-X.699 X.600-X.629 X.630-X.649 X.650-X.679 X.680-X.699 X.700-X.799 X.700-X.709 X.7
7、 10-X.719 X.720-X.729 X.730-X.799 X.800-X.849 X.850-X.899 X.850-X.859 X.860-X.879 X.880-X.899 X.900-X.999 For further details, please refer to ITU-TList of Recommendations. STD-ITU-T RECMN X.223-ENGL 1776 98b257L 0622559 703 FOREWORD The ITU-T (Telecommunication Standardization Sector) is a permanen
8、t organ of the International Telecommunication Union (ITU). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen- dations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conferen
9、ce (WTSC), which meets evey 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 (Helsinki, Marc
10、h 1-12, 1993). IT-T Recommendation X.123 was prepared by ITU-T Study Group 7 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 5th of October 1996. NOTE in this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication ad
11、ministration and a recognized operating agency. 0 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 ffom the ITU. Recommendation X.123 (10/
12、96) 1 STD-ITU-T RECMN X.LZ3-ENGL L97b Lihb257L Ob22555 bLiT = CONTENTS Page 1 Introduction 2 References 3 Mapping from protocols using escape codes where X.121 is the default numbering plan to protocols using TOA/NPI Mapping fiom protocols using escape codes where E. 164 is the default numbering pla
13、n to protocols using TOANPI Mapping from protocols using TOA/NPI to protocols using escape codes where X.121 is the default numbering plan . Mapping from protocols using TOMI to protocols using escape codes where E.164 is the default numbering plan . 4 5 6 2 2 2 2 11 Recommendation X.123 (10196) STD
14、*ITU-T RECMN X*LZI-ENGL L77b m 48b257L Ob2255b 58b m SUMMARY This Recommendation describes the mapping between the escape code address format and the TOANPI address format that is necessaq during the transition period when some interfaces will be using TOANPI while other interfaces will still be usi
15、ng escape codes. . 111 Recommendation X.123 (10196) -% -2. r . -. -. . . . . - . . . . Recommendation X.123 MAPPING BETWEEN ESCAPE CODES AND TOMI FOR E.164K.121 “MBERING PLAN INTERWORKING DURING THE TRANSITION PERIOD (Geneva, 1996) 1 Introduction This Recommendation describes the mapping between esc
16、ape codes and TOMPI that is necessary during the transition period when some interfaces will be using TOMPI while other interfaces will still be using escape codes. Recommendation E.164 provides for escape code O to be used to indicate that the digits following the escape code are digits according t
17、o the X. 12 1 numbering plan. This is seen as a temporary arrangement to facilitate interworking prior to the full implementation of Numbering Plan Identifier (NPI) based signalling protocols within packet mode terminals identified by an E.164 number. Recommendation E.165.1 (1996) provides for the c
18、ontinued use of Escape code “O“ within the E.164 numbering plan until 2359 hrs (UTC) 31 December 2000 to enable interworking to occur during the transition period to implementation of the NPI mechanism Recommendation X.121 provides for escape codes 9 and O to be used to indicate that the digits foll
19、owing the escape code are digits according to the E.164 numbering plan. Escape code O also indicates that a digital interface on the destination network (ISDN or integrated ISDNRSTN) is requested. Escape code 9 also indicates that an analogue interface on the destination network (PSTN or integrated
20、ISDNRSTN) is requested. The long-term requirement is for the use of TOA/NPI in place of the present use of escape codes. 2 References This Recommendation is related to and is compatible with the following Recommendations. CCITT Recommendation E. 164 (1991), Numberingplan for the ISDN era. CCITT Reco
21、mmendation E. 165 (1988), Timetable for coordinated implementation of the full capabiliry of the numbering plan for the ISDN era (Recommendation E.164). ITU-T Recommendation E.165.1 (1996), Use of Escape code “O“ within the E. 164 numberingplan during the transition period to implementation of NPI m
22、echanism. ITU-T Recommendation E.166BC.122 (1996), Numbering plan interworking for the E.164 and X. 121 numbering plans. IT-T Recommendation X. 121 (1996), International Numberingplan for public data networks. IT-T Recommendation X.25 (1996), Interface between Data Terminal Equipment (DTE) and Data
23、Circuit- terminating Equipment (DCE) for terminals operating in packet mode and connected to public data networks by a dedicated circuit. ITU-T Recommendation X.75 (1996), Packet-switched signalling system between public networks providing data transmission services. Recommendation X.123 (10196) 1 S
24、TD-ITU-T RECMN X.123-ENGL 199b qAb259L Ob22557 295 9 Address Mapping Function 3 Mapping from protocols using escape codes where X.121 is the default numbering plan to protocols using TOAINPI x.121 T07237CC-951d03 Address Mapping x.121 Function T07236BO-9Yd01 Escape code TOAINPI - Address Mapping Fun
25、ction 9 O E.164 T072371095/do4 TOA = International number, NPI = E.164 (analogue) TOA = International number, NPI E.164 (digital) 4 Mapping from protocols using escape codes where E.164 is the default numbering plan to protocols using TOANPI E.164 I Address Mapping Function Escape code O TOAINPI TOA
26、 = International number, NPI = X.121 5 Mapping from protocols using TOA/NPI to protocols using escape codes where X.121 is the default numbering plan TOA = International number, NPI = E.164 (analogue) TOA = international number, NPI = E.164 (digital) 9 O 6 Mapping from protocols using TOA/NPI to pro
27、tocols using escape codes where E.164 is the default numbering plan 2 Recommendation X.123 (10196) STD-ITU-T RECMN X*L23-ENGL 177b m 48b2591 Ob225b0 TO7 m Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P S
28、eries Q Series R Series S Series T Series U Series V Series X Series Z ITU-T RECOMMENDATIONS 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 Transmissio
29、n systems and media Transmission of non-telephone signals Integrated services digital network Transmission of sound-programme and television signals Protection against interference Construction, installation and protection of cables and other elements of outside plant Maintenance: international tran
30、smission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound-programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminal equipments and protocols for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communication Programming languages I lllll1ll1llllllllllll1llll111 *9722* Printed in Switzerland Geneva, 1997
