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E.164 The International Public Telecommunication Numbering Plan Scope and Structure

E.164 The International Public Telecommunication Numbering Plan Scope and Structure. Abdelfattah ABUQAYYAS CoE/ARB Coordinator abuqayyas@itu.int ITU - BDT. ITU and E.164. What is the ITU?

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E.164 The International Public Telecommunication Numbering Plan Scope and Structure

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  1. E.164The International Public Telecommunication Numbering PlanScope and Structure Abdelfattah ABUQAYYAS CoE/ARB Coordinator abuqayyas@itu.int ITU - BDT Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  2. ITU and E.164 • What is the ITU? • Iinternational organization where governments and private sector coordinate global telecom networks and services • Founded in 1865, it is the oldest specialized agency of the UN system • 189 Member States, 650 Sector Members, 75 Sector Associates • Website: http://www.itu.int • What is E.164? • ITU-T Recommendation E.164: “The international public telecommunication numbering plan” • Tied to treaty obligations (specific roles and obligations defined for ITU Member States and ITU-T TSB Director) • Defines number structure and functionality for principal categories of numbers Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  3. E.164: The international public telecommunication numbering plan • Recommendation E.164 provides the number structure and functionality for the three categories of numbers used for international public telecommunication. • All telephone numbers can be called if a number is dialled of upto 15 digits, made up of a one to three digit country code (CC), followed by the subscriber number (SN). • The first few digits of the subscriber number can be a so called National Destination Code (NDC), which can identify the type of telephone number you're calling. • All country codes are assigned by ITU in Recommendation E.164 • Within Recommendation E.164 four categories of telephone numbers are recognized, namely for: • National (Geographical areas) telephone services • Global telephone services • International networks • Group of countries Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  4. E.164 Scope • E.164 provides the number structure and functionality for the following three categories of International Public Telecommunication numbers (E.164 numbers). Geographical Global Networks areas services • In addition to these three categories the following two new categories will hopefully appear in a revised E.164. Groups of Trials countries Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  5. Examples of E.164 Resources • Geographic areas • ITU Member States, including integrated numbering plan involving more than one (e.g. +1) • Global Services • Universal International Freephone Numbers (+800) • Universal Personal Telecommunications (+878 + 2 digit IC) • Networks • Global Mobile Systems (+881 + 1 digit IC) • Shared code for Networks (+ 882 + 2 digit IC) • Groups of Countries • ETNS • For each of the categories, it details the components of the numbering structure and the digit analysis required to successfully route the calls Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  6. Structures and optionsNational telephone services CC NDC + SN An international public telecommunication number (for geographic areas) is also referred to as the national significant number (NSN), which consists of the country code CC, national destination code NDC and the subscriber number SN. The country code consists of one to three digits and the national destination code is optional.Number structure for geographical areas CC NDC SN • CC: country code (1 – 3 digits) • NDC: national destination code • SN: subscriber number Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  7. Structures and options CC NDC SN NDC SN Numbers for geographical areas, formats for national use. Option 1: separated NDC and SN SN Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  8. Structures and options Numbers for geographical areas, formats for national use. Option 1: separated NDC and SN CC NDC SN NDC SN SN National prefix International prefix Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  9. Structures and options Numbers for geographical areas, formats for national use. Option 2: connected NDC and SN CC NDC SN NDC SN National subscriber number The leading digits of the national subscriber numbers indicates services and/or geography. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  10. Structures and options Numbers for geographical areas, formats for national use. Option 2: connected NDC and SN CC NDC SN International prefix NDC SN When NDC and SN are inseparably connected to form a single dialling sequence, a national prefix is not necessary. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  11. Structures and options Numbers for geographical areas, formats for national use. Option 1 and 2 are normally used in parallel, with option 1 for geographic numbers and option 2 for national location independent numbers. Option 2 can however be used for both type of numbers nationally. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  12. Structures and optionsGlobal telephone services Country code (3 digits) CC • An international public telecommunication number for global telephone services consists of a three digit country code and global subscriber number. The country code is always in the the 8xx or 9xx range Numbers for Global Services GSN Global significant number (Max 12 Digits) Global significant number • The leading digits of GSN may indicate some service specific characterics. • The global services have only one international format, but access to global services • CC: Country Code for global service (800, 808, 878, 979) • GSN: Global Significant Number • SN: subscriber number Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  13. Structures and optionsNumbers for Networks CC4 CC1 CC2 CC3 • Network is inter- nationallly interconnected physical nodes and operational systems operated and maintained by one or more ROAs to provide public Telecommunication service Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  14. Structures and optionsInternational networks CC IC + SN CC IC SN • An international public telecommunication number for international networks consists of three digit country code, a network identification code and a subscriber number. The country code is always in the 8xx range. The identification code is one to four digits. Numbers for Networks CC: Country Code for Networks (882) - 3 digits IC: Identification Code - 1 to 4 digits SN: Subscriber Number - Max 15-n (number of digits in CC+IC) digits Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  15. Structures and options CC IC SN IC SN SN Numbers for Networks, optional formats Incoming to Network Between Networks Network internal To use the three formats for the mentioned purposes each Network would have to create their own Network internal prefixes. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  16. Structures and optionsNumbers for Groups of countries CC GIC SN Numbers for Groups of countries 3 digits 1 digit Max 11 digits CC: Country Code for Groups of countries (tbd) GIC: Group Identification Code SN: Subscriber Number Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  17. Structures and optionsNumbers for Trials CC TIC SN Numbers for Trials 3 digits 3 digits Max 9 digits CC: Country Code for Trials (991) TIC: Trial Identification Code SN: Subscriber Number Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  18. Numbering for geographic areas Prefixes are not part of the E.164 number and are not signalled over international boundaries. E.164 indicates preference for the use of digit 0 as national prefix. The digit analysis should not be more than 7 digits to determine the country of destination, the most appropriate routeing and the proper charging. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  19. Planning advices for geographic areas • The national numbering plans should be designed: a) to allow for generous provision of future growth; b) so that the national networks be accessible to subscribers in other countries by means of international dialling procedures. c) so that subscribers would always be called by the same national number regardless of where the call is originated from within a national numbering plan. • It is recommended that notification of national numbering changes be submitted at least 2 years in advance. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  20. International prefix CC4 CC1 CC2 CC3 E.164 recommends that Administrations that are revising their numbering plans adopt 00 as an international prefix. 00 + E.164 numbers Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  21. Frequently asked question • When is a number an E.164 number? • When it satisfies the following: 1. It has to be part of an ITU defined fixed international hierarchical structure. 2. It has to be maximum 15 digits. 3. It has to be unique in its international format. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  22. Case Study - Singapore • The National Numbering Plan provides a set of rules and guidelines for assigning numbers to Public Switched Telephone Network (PSTN) and Radio Network. • The Plan also describes the assignment of numbers to international, trunk, emergency and special services such as voice mail, Intelligent Network (IN) services. • Under the plan, numbers are categorized in various services under the National Numbering Plan according to the first digit. • The structure of the national number generally complies with the relevant (ITU-T) Recommendations. • IDA, as the regulator for telecommunications, controls and manages the National Numbering Plan to ensure that the number allocation process is fair and transparent. • IDA has to strike a balance in ensuring that the limited number resources are used efficiently and optimally and yet do not impose undue operational constraints on the telecommunication service providers. • The National Numbering Plan will be reviewed from time to time to ensure its continued relevance in light of technological advances and the introduction of new services Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  23. Case Study – SingaporeNumbers with Leading Digit 0 and 1 • Numbers with Leading Digit 0 • Numbers beginning with the digit ‘0’ are reserved for international services such as prefixes for International Direct Dial (IDD) service, Subscriber Trunk Dial (STD). The length of these prefixes is standardized at three digits. They are referred to as Level ‘0’ short codes. • Facility Based Operators (FBO) licensees are eligible for 3-digit access codes provided that they commit an overall investment in infrastructure of an amount not less than S$150 millions over the first 3 years from date of licensing. FBO licensees must use the access codes to provide service for the mass consumer market. • Numbers with Leading Digit 1 • Numbers beginning with the digit ‘1’ are reserved for special services which includes calls for operator assistance, service enquiry, voice information, IN services and access code IDD type of services. Their length generally ranges from four to five digits. They are referred to as Level ‘1’ short codes. • Only FBO licensees are eligible for level ‘1’ short codes. However, for Service-based Operator (SBO) licensees who propose to operate an International Simple Resale (ISR) service. they will be also be allocated from ‘15XX’ level. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  24. Case Study – SingaporeNumbers with Leading Digit 6 and 9 • Numbers with Leading Digit 6 • Numbers beginning with the digits ‘6’ are reserved for use as ordinary PSTN numbers. The length of these numbers is standardized at eight digits. • A FBO licensee offering domestic telephony services are eligible for PSTN numbers. • Numbers with Leading Digit 9 • Numbers beginning with the digit ‘9’ are reserved for three digit emergency services and eight digit Radio Network numbers. • FBO licensees offering Radio Network services including Public Cellular Mobile Telephone Services, Public Radio Paging Services and Public Trunked Radio Services are eligible for Radio Network numbers. Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

  25. E.164The International Public Telecommunication Numbering PlanScope and Structure THANK YOU abuqayyas@itu.int ITU – BDT Workshop on Numbering Plan Policies Sana’a – Yemen, 13 – 15 September 2004

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