1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T E.168TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(05/2004) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS International operation Numbering plan of the international telephone service Application
2、 of E.164 numbering plan for UPT Amendment 1: New Appendix I ITU-T Recommendation E.168 (2002) Amendment 1 ITU-T E-SERIES RECOMMENDATIONS OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS INTERNATIONAL OPERATION Definitions E.100E.103 General provisions concerning Adm
3、inistrations E.104E.119 General provisions concerning users E.120E.139 Operation of international telephone services E.140E.159 Numbering plan of the international telephone service E.160E.169 International routing plan E.170E.179 Tones in national signalling systems E.180E.189 Numbering plan of the
4、 international telephone service E.190E.199 Maritime mobile service and public land mobile service E.200E.229 OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELEPHONE SERVICE Charging in the international telephone service E.230E.249 Measuring and recording call dura
5、tions for accounting purposes E.260E.269 UTILIZATION OF THE INTERNATIONAL TELEPHONE NETWORK FOR NON-TELEPHONY APPLICATIONS General E.300E.319 Phototelegraphy E.320E.329 ISDN PROVISIONS CONCERNING USERS E.330E.349 INTERNATIONAL ROUTING PLAN E.350E.399 NETWORK MANAGEMENT International service statisti
6、cs E.400E.409 International network management E.410E.419 Checking the quality of the international telephone service E.420E.489 TRAFFIC ENGINEERING Measurement and recording of traffic E.490E.505 Forecasting of traffic E.506E.509 Determination of the number of circuits in manual operation E.510E.51
7、9 Determination of the number of circuits in automatic and semi-automatic operation E.520E.539 Grade of service E.540E.599 Definitions E.600E.649 Traffic engineering for IP-networks E.650E.699 ISDN traffic engineering E.700E.749 Mobile network traffic engineering E.750E.799 QUALITY OF TELECOMMUNICAT
8、ION SERVICES: CONCEPTS, MODELS, OBJECTIVES AND DEPENDABILITY PLANNING Terms and definitions related to the quality of telecommunication services E.800E.809 Models for telecommunication services E.810E.844 Objectives for quality of service and related concepts of telecommunication services E.845E.859
9、 Use of quality of service objectives for planning of telecommunication networks E.860E.879 Field data collection and evaluation on the performance of equipment, networks and services E.880E.899 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. E.168 (2002)/Amd.1 (05
10、/2004) i ITU-T Recommendation E.168 Application of E.164 numbering plan for UPT Amendment 1 New Appendix I Summary It has been shown in this appendix that the existing methods used already in VISIONng and the general technical and administrative principles and procedures already used for number port
11、ability in national environments may also be used to implement service provider portability with the UPT 878 Country Code for Global Services. Source Amendment 1 to ITU-T Recommendation E.168 (2002) was approved on 28 May 2004 by ITU-T Study Group 2 (2001-2004) under the WTSA Resolution 1. ii ITU-T
12、Rec. E.168 (2002)/Amd.1 (05/2004) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, o
13、perating and tariff questions and issuing Recommendations on them 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
14、, 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 fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE
15、In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g
16、. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not sug
17、gest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY 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 evi
18、dence, validity or applicability of claimed Intellectual Property Rights, whether asserted by 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
19、may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2004 All rights reserved. No part of this publication may be reproduced, by any means what
20、soever, without the prior written permission of ITU. ITU-T Rec. E.168 (2002)/Amd.1 (05/2004) iii CONTENTS Page I.1 Introduction 1 I.2 Requirements 1 I.3 Implementation of Service Provider Portability within VISIONng . 1 I.4 Implementation of Service Provider Portability with other entities. 2 I.5 Ro
21、uting of calls from networks not supporting the UPT service . 3 I.6 Other possibilities. 4 I.7 Further study. 4 ITU-T Rec. E.168 (2002)/Amd.1 (05/2004) 1 ITU-T Recommendation E.168 Application of E.164 numbering plan for UPT Amendment 1 New Appendix I I.1 Introduction The issues of number portabilit
22、y are recognized as being complex and that VISIONng needs to be able to provide portability if another provider/entity is assigned numbering resources in the UPT 878 number range. This appendix provides a detailed explanation. I.2 Requirements The CC 878 is allocated, according to ITU-T Rec. E.164 t
23、o Global Services and specifically to the global implementation of UPT as defined in ITU-T F.85x-series Recommendations and in the body of this Recommendation. The services offered need to conform to the UPT service criteria. UPT stands for Universal Personal Telecommunications and one of the basic
24、service criteria is the assignment of the related E.164 number to the end user (subscriber). Regarding Number Portability, this implies as basic requirement Service Provider Portability. This means that an end user having assigned an UPT 878 E.164 number may change his/her service provider at any ti
25、me and keep his assigned UPT 878 number. Since the UPT 878 country code is a global service, this also implies that the end user may choose a service provider independent of his nationality and the nationality of the service provider. This Service Provider Portability has to be provided within the w
26、hole UPT 878 country code and not only within a given number range within UPT 878 (e.g., within 87810). I.3 Implementation of Service Provider Portability within VISIONng The number range 87810 has been assigned to VISIONng. VISIONng is currently setting up a global UPT service offering services acc
27、ording to the UPT service criteria. This also implies, as already stated above, Service Provider Portability between all VISIONng Service Providers offering UPT services to end users. The Service Provider Portability is achieved by operating a common database called TIPHON Resolution Capability (TRC
28、). The TRC consists of two parts: the Administrative Part, and the Real Time Part. The Administrative Part is administrating the 87810 number range by keeping track of available numbers and allowing the VISIONng operators and ENUM Registrars to request single numbers on the end users behalf. The Adm
29、inistrative Part is also keeping track of which number is currently hosted by which VISIONng service provider for UPT service and/or for ENUM service. The data in the Administrative Part of the TRC is also downloaded to the Real Time Part of the TRC. The Real Time Part of the TRC serves as online da
30、tabase to be queried during call setup time by VISIONng service providers to route the call properly to the VISIONng service provider currently hosting the UPT end user and/or launch an ENUM query if the end user has opted-in into ENUM. The Real Time Part of the TRC is currently using a proprietary
31、protocol defined by VISIONng; a development to use ENUM technology is ongoing. 2 ITU-T Rec. E.168 (2002)/Amd.1 (05/2004) The routing of calls from the PSTN is not concerned with the service provider portability within VISIONng, since all calls are routed to gateways operated by VISIONng service prov
32、iders. If VISIONng is assigned additional number ranges out of CC 878 for UPT, service provider portability can be implemented with the same principles. I.4 Implementation of Service Provider Portability with other entities If number ranges out of CC 878 for UPT are assigned to entities other than V
33、ISIONng, it is required that the end users assigned 878 UPT E.164 numbers out of the number ranges assigned to VISIONng may port these numbers to service providers of the other entities and vice versa, independent of the technology used within the entities. Since the technology used by such other en
34、tities is unknown, only general principles and the view of VISIONng can be given here. In the PSTN, many different solutions exist for number portability in different countries and also for different purposes even in a specific country, depending on regulations and also on technology. The easiest so
35、lution to be implemented is onward routing; this is also the basic solution proposed here. The reasons are: 1) Onward routing is not involving the originating network: This is important because it is difficult enough to convince originating networks to open access to the number ranges, without placi
36、ng extra burdens such as querying an NP database. 2) Onward routing does not require a common (in this case global) database. 3) Administration and provisioning procedures are well known and understood and may easily be implemented. 4) If other entities are also operating on the Internet, only call
37、signalling is involved, whereas the media streams still may be routed directly, avoiding tromboning. Other, more advanced and efficient solutions, e.g., direct routing and All Call Query may be implemented later by other networks depending on the technology available and on agreements with these net
38、works. For example, it may be appropriate for service providers of UPT to check calls originating on their network to other UPT ranges (i.e., VISIONng to check ranges other than +87810) to detect any calls to numbers imported to them. I.4.1 Numbers ported out from VISIONng If a number is ported out
39、from VISIONng, this fact is stored within the Administrative Part of the TRC. In addition, the identification of the recipient entity is stored. It has to be agreed between VISIONng and the recipient entity where calls hosted by a service provider of the recipient entity have to be routed to, that i
40、s one or more Points-of-Interconnect (PoI) have to be defined between VISIONng and the other entity, including the proper routing and signalling information. These PoIs may be located on the PSTN or on the Internet or on both. The identification for the entity hosting the ported-out number is also d
41、ownloaded to the Real Time TRC. If a call is received by a VISIONng service provider, the Real Time TRC is queried as usual and if an identification of another entity is retrieved, the call is routed by the VISIONng service provider to the nearest available PoI. This may or may not involve routing v
42、ia other VISIONng service providers. The routing within environment of the other entity to the service provider hosting the subscriber is up to the other entity. If there are several other entities (two or more), each entity needs a proper identification within the VISIONng TRC, and the calls are ro
43、uted according to the identifications provided. ITU-T Rec. E.168 (2002)/Amd.1 (05/2004) 3 In case of onward routing, VISIONng remains the anchor entity for the number ranges assigned to VISIONng. If an 878 number originally assigned to VISIONng is ported from one other entity to another, VISIONng ne
44、eds to be notified to properly update the TRC. The administrative and provisioning procedures in this case will be similar to existing procedures in use. No notification is necessary if such an 878 number is ported within an entity from one service provider of this entity to another. I.4.2 Numbers p
45、orted into VISIONng If a number is ported into VISIONng from another entity, VISIONng needs to host this number. Therefore, VISIONng needs to expand its Administrative and Real Time TRC to numbers or number ranges not assigned to VISIONng. This can be implemented easily; the TRC just needs to store
46、the identification of the hosting VISIONng service provider for this number. If a call is received by a VISIONng service provider for any 878 UPT number (not only for 87810), the Real Time TRC is queried. This is to determine if a number has been imported to one of the VISIONng service providers. If
47、 a number range is queried that is not assigned to any entity, and the number has not been imported, the call is routed to the nearest PoI of the entity holding this number range. It is then up to the other entity to handle this number properly. If the number is hosted by a VISIONng service provider
48、, either native to or ported in, the VISIONng service provider, identification is retrieved and the number is routed within VISIONng. It is of course assumed by VISIONng that the other number range holders have the same responsibilities, e.g., if a call is received to their range and where a number
49、is ported out to VISIONng to determine this fact and route the call properly to VISIONng. I.5 Routing of calls from networks not supporting the UPT service I.5.1 Onward routing Currently, calls to UPT 87810 are routed from the originating network to the nearest VISIONng ingress gateway. If other entities are assigned other number ranges out of UPT 878, it is envisaged that numbers are routed to gateways or PoIs defined by this entity. With number portability, a call to numbers ported out from VISIONng to another entity is still routed to VISIONng gateway
