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Document IPW-3 1

Numbering, Naming, andAddressing 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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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

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Q1/2 Collaborators

Network Operators (Competitors)

Domestic - fixed and wirelessInternational

Global and Regional Satellite

Service Providers

Vendors - Equipment and Software Regulatory Authorities

Numbering Plan Administrators

Industry Associations

Regional Standards Forums

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Work Methods and Considerations

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

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Scope of Work 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 MobileUsers

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Scope of Work

Resolve requests for Numbering Resources

Develop New Recommendations

Consultant to the ITU-TSB (Resource Registrar)

Numbering Coordination Team (NCT)

Assignment Guidelines and Procedures for GlobalResources

Global Numbering Resource Management

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

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Successful Issue Resolutions 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

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NNA Expertise and Experience

Numbering/Dialing Plan Design and Utilization

Numbering Plan Administration and Management

Numbering Requirements for

Services/Capabilities

Network OperationsNumbering Impacts on Networks

Regulatory Impacts of Numbering/Dialing Issues

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E.164 Numbers - Format & Functions(1/3)

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

Country Code Global Subscriber Number

Country Code Identification Code Subscriber Number

responsibility of each countryor geographical areaITU

ITU responsibility

ITU responsibility

responsibility ofeach network

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E.164 Numbers - Format & Functions(2/3)

Typical Functions

Identify a terminating network and a customers physical interface of

telephone / ISDN Identify customer premises connected to an interface (dial-in)

Identify services and customers (freephone/ mobile)

Logical Physical

Name 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 numbereg. 800XXXXXXXX

E.164 numbereg. 41227305887translation

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E.164 Numbers - Format & Functions(3/3)

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 networkoperators

CC NDC SN

Prefix Number

International Prefix

National Prefix NDC SN

E.164 Number Sub-address

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E.164 advantages

Simplicity

Language neutral & Special characters unnecessary

Supported by simple terminals

Administration

Unambiguous administration

Generally no explicit linkage between digits and an

organizationSecurity

Competition

Mechanism available to select transit network operatorbased on a callers choice

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NN&A For New Technologies - Exampleof Collaborative Effort

E.191, B-ISDN Addressing

Created strong linkage with ATM Forum Organized presentations in both Forums (ITU & ATM)

Gained knowledge of each others 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 ATMterminology

Recognition and promotion of the Addressing and Routing linkage

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2000-2005 Work Plan 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-basednetworks

Long-term: study potential convergence of NN&A schemes for allinternational networks