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Numbering, Naming, and Addressing at ITU-T Study Group 2 (SG2). Presentation by: Fred Gaechter Rapporteur, Q1/2 +1 732 699 5500 fredgaechter@monmouth.com.

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Numbering naming and addressing at itu t study group 2 sg2
Numbering, Naming, and Addressing at ITU-T Study Group 2 (SG2)

Presentation by:

Fred Gaechter

Rapporteur, Q1/2

+1 732 699 5500

fredgaechter@monmouth.com

Document IPW-3


Numbering naming and addressing at itu t study group 2 sg2

Question 1: Applications of Numbering, Naming and Addressing Plans for Fixed & Mobile ServicesITU-T Study Group 2: Network & Service Operations

  • Collaborators

  • Work Method & Considerations

  • Scope of Work

  • NN&A Expertise & Experience

  • Successful Resolutions

  • E.164 Numbers - Format and Functions

  • NN&A for New Technologies

  • Work Program for 2001-2005 Study Period


Q1 2 collaborators
Q1/2 Collaborators Plans for Fixed & Mobile Services

  • Network Operators (Competitors)

    • Domestic - fixed and wireless

    • International

    • Global and Regional Satellite

  • Service Providers

  • Vendors - Equipment and Software

  • Regulatory Authorities

  • Numbering Plan Administrators

  • Industry Associations

  • Regional Standards Forums


Work methods and considerations
Work Methods and Considerations Plans for Fixed & Mobile Services

  • Work Methods

    • Contribution driven

    • Consensus decisions at RG and WP levels

  • Work Considerations

    • Enable new services and capabilities

    • Ensure resource inventory - availability vs. conservation

    • Fair and equitable use and assignment of resources

    • Accommodate and encourage competition

    • Conform to regulations in all countries

    • Support growth in developing countries


Scope of work
Scope of Work Plans for Fixed & Mobile Services

  • Development, Maintenance, and Application of E-Series Numbering, Naming and Addressing Recommendations

    • E.164

      • E.164.1 - Criteria & Procedures for the Reservation, Assignment & Reclamation of E.164 CCs and ICs

    • E.168 - Application of E.164 for UPT

    • E.169 - Application of E.164 Numbering Plan for UIFN

      • E.169.2 - Application of E.164 Numbering Plan for UIPRN

      • E.169.3 - Application of E.164 Numbering Plan for UISCN

    • E.190

    • E.191 - B-ISDN Numbering and Addressing

      • E.191.1 - Criteria & Procedures for ITU-Defined AESAs

    • E.193 - E.164 Country Code Expansion

    • E.195 - ITU Global Numbering Resource Administration

    • E.212 - International Identification Plan for Mobile Terminals and Mobile Users


Scope of work1
Scope of Work Plans for Fixed & Mobile Services

  • Resolve requests for Numbering Resources

  • Develop New Recommendations

  • Consultant to the ITU-TSB (Resource Registrar)

    • Numbering Coordination Team (NCT)

  • Assignment Guidelines and Procedures for Global Resources

  • Global Numbering Resource Management

  • Lead ITU Study Group(SG2) for Numbering matters (Res. 20)


Successful issue resolutions
Successful Issue Resolutions Plans for Fixed & Mobile Services

  • Expanded Numbering Resource Functionalities

    • E.164 - Geographic to Services, Networks, and GMSSs

    • E.212 - Wireless to Fixed

  • Numbering Resources for New Services/Capabilities

    • UPT, B-ISDN, UIFS, UIPRS, UISCS, GMSS, IMT2000

  • Studied IP Telephony Numbering - based on ETSI Tiphon Request

  • E.164/X.121 Interworking Arrangement

  • Advisor to ITU-TSB as Global Resource Registrar

  • Report on Numbering Plans for GII

  • Carrier/Service Provider Selection Supplement

  • Number Portability Supplement

  • Resources for Groups of Countries

  • Resources for Trials

  • INMARSAT SNAC


Nna expertise and experience
NNA Expertise and Experience Plans for Fixed & Mobile Services

  • Numbering/Dialing Plan Design and Utilization

  • Numbering Plan Administration and Management

  • Numbering Requirements for Services/Capabilities

  • Network Operations

  • Numbering Impacts on Networks

  • Regulatory Impacts of Numbering/Dialing Issues


E 164 numbers format functions 1 3
E.164 Numbers - Format & Functions(1/3) Plans for Fixed & Mobile Services

  • History

    • Available since 1964 as international telephony number plan

    • Has evolved to enable and conform to new technologies, e.g. ISDN, Intelligent Network, ATM, etc.

  • Three formats available (differentiated with Country Code)

    • Geographical (Switzerland, North America, etc.)

    • Global service (e.g., International Freephone Service, etc.)

    • Network (BT, MCIWorldcom, etc)

Country Code

National Destination Code

Subscriber Number

responsibility of each country

or geographical area

ITU

Country Code

Global Subscriber Number

ITU responsibility

Country Code

Identification Code

Subscriber Number

responsibility of

each network

ITU responsibility


E 164 numbers format functions 2 3
E.164 Numbers - Format & Functions(2/3) Plans for Fixed & Mobile Services

  • Typical Functions

    • Identify a terminating network and a customer’s physical interface of telephone / ISDN

    • Identify customer premises connected to an interface (dial-in)

    • Identify services and customers (freephone/ mobile)Logical PhysicalName like Address like

  • A Trend of E.164 (increasing “naming” role)

    • Created as “address” for telephony

    • Today, use of E.164 number as “name” is increasing: - Intelligent Network Services - Number Portability

E.164 number

eg. 800XXXXXXXX

E.164 number

eg. 41227305887

translation


E 164 numbers format functions 3 3
E.164 Numbers - Format & Functions(3/3) Plans for Fixed & Mobile Services

Number

Prefix

  • Dialing and Sub-addressing

    • ITU-T terminology “prefix” is not a part of “E.164 number”

    • Prefixes determine the following format of E.164 number

    • Sub-addresses provide additional address information

  • Security

    • E.164 numbers are transported in secure dedicated signalling network

    • Calling Line Identification (Caller ID) is provided / verified by network operators

CC

NDC

SN

International Prefix

NDC

SN

National Prefix

E.164 Number

Sub-address


E 164 advantages
E.164 advantages Plans for Fixed & Mobile Services

  • Simplicity

    • Language neutral & Special characters unnecessary

    • Supported by simple terminals

  • Administration

    • Unambiguous administration

    • Generally no explicit linkage between digits and an organization

    • Security

  • Competition

    • Mechanism available to select transit network operatorbased on a caller’s choice


Nn a for new technologies example of collaborative effort
NN&A For New Technologies - Plans for Fixed & Mobile ServicesExample of Collaborative Effort

  • E.191, B-ISDN Addressing

    • Created strong linkage with ATM Forum

    • Organized presentations in both Forums (ITU & ATM)

      • Gained knowledge of each other’s perspective

      • Broke down barriers and mistrust

    • Ongoing relationship - regular meeting updates

    • Cross fertilization of ideas through frequent communication

    • Identified gap for global address authority

    • Filled that gap - development of ITU IND

    • Separation and definition of Name, Number, and Address

    • Re-naming E.191 to B-ISDN Addressing to accommodate ATM terminology

    • Recognition and promotion of the Addressing and Routing linkage


2000 2005 work plan
2000-2005 Work Plan Plans for Fixed & Mobile Services

  • Continuation/Conclusion of Projects Shown in “Scope of Work” and “Successful Issue Resolutions”

  • Global Evolution of NN&A

    • Predict evolution of services, technologies, capabilities, and networks

    • Define NN&A in the context of the predictions

    • Develop a NN&A scheme for the future

  • NN&A for Interworking Between E.164 & IP Address-Based Networks

    • Assumes convergence of existing telecom networks and IP address-based networks

    • Develop NN&A mechanism(s) to support interworking

      • Near-term: determine use of E.164 resources by IP address-based networks

      • Long-term: study potential convergence of NN&A schemes for all international networks