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Numbering / Addressing in Private Integrated Services Networks (PISN). Background to ECMA. An International Europe-based Industry Association for Standardizing Information and Communication Systems. Objective

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Background to ECMA

  • An International Europe-based Industry Association
  • for Standardizing Information and Communication Systems
  • Objective
    • Development and promulgation of standards and technical reports for information and communication systems
    • With Direct Outlets on International and European Levels
      • ISO/IEC JTC 1



Joint ECMA-ETSI Agreement and Committee

  • Provides for co-operation between ETSI and ECMA on certain designated topics
  • Avoids duplication of work
  • Mutual participation in working committees
  • ECMA deliverables publishable as ETSI documents through routes such as Public Enquiry



Standardizing Information

and Communication Systems


Communication, Networks and Systems Interconnection

Responsibility for corporate networks, including QSIG protocol, mobility support, addressing, numbering, management, CTI etc.

TG13 – Corporate Networks – Network Architecture, Numbering, Naming and Addressing

TG17 - IP-based multimedia communications




Numbering and Addressing

in Narrowband and Broadband PISNs

ECMA – 155

(ETS 300 189 - ISO/IEC 11571)

  • Handling of network addresses for entities which use
  • or provide telecommunication services offered by PISNs
  • Requirements for :
  • - Numbering
  • coding of numbering information,
  • Support of Private Numbering Plan
  • - Addressing of network service access points
  • - Subaddressing



Native PISN numbering plans

  • The ISDN numbering plan according to ITU-T Rec. E.164
  • A Private Numbering Plan (PNP)
  • An implicit numbering plan
  • The Data Country Code (DCC) numbering plan (ISO/IEC 8348) (introduced for ATM)
  • The International Code Designator (ICD) numbering plan
    • (ISO/IEC 8348) (introduced for ATM
  • Any combination of these numbering plans



Private Numbering Plans

  • Defined by the PISN administrator
  • Not globally unique –
  • PNP numbers significant only within
  • the PISN / Corporate Network concerned
  • Digits 0-9 - maximum length as for E.164
  • Can be structured into a maximum of 3 levels:
      • level 2 regional number
      • level 1 regional number
      • local number
  • May be mappable to corresponding E.164numbers,
  • e.g., where DDI is available.



Implicit numbering plans

  • Defined by the PISN administrator
  • Not globally unique –
  • Implicit numbers significant only within
  • the PISN / Corporate Network concerned
  • Digits themselves indicate significance of number
  • (e.g., through prefix digits)
      • whether public or private
      • whether public number is subscriber, national
      • or international
      • whether private network is local, regional, etc.
  • Digits 0-9 - maximum length can exceed that for E.164
  • because of need to accommodate prefix digits
  • May be mappable to corresponding E.164 numbers,
  • e.g., where DDI is available




IP-based multimedia communications

  • Officially created in March 1999
  • 3 meetings with :
    • Alcatel, Bosch Telecom, Deutsche Telekom, ECI Telecom, Ericsson, Lucent Technologies, NIST, Nortel Networks, Philips Business Communications, PQM Consultants, Siemens, Unisys
  • Scope: To develop Standards and Technical Reports for
  • IP-based multimedia communications
  • in a business environment



TG17 - Objectives

  • To identify requirements including architectural, addressing, mobility, service, protocol, interworking, QoS, security and management aspects
  • To adapt, where necessary, existing standards for narrowband and broadband PISNs to the requirements of IP-based multimedia communication in a business environment
  • To develop, where necessary, standards for interoperation of IP-based networks and telecommunication networks
    • consideration to co-existence of IP networks employing H.323 / H.450 or SIP and Private Integrated Services Networks (PISN) employing QSIG
  • To co-ordinate liaison on related matters with ITU-T, ETSI, TIA, IETF, IMTC, ISO/IEC JTC1 in order to promote a worldwide unique set of standards for IP-related multimedia communication in a business environment



ECMA TC32 RequirementsJ

Numbering / Addressing in CN - Impact on IP telephony

  • Part of a Corporate Network may comprise an IP network that supports telephony (IP telephony)
  • èRequirements
  • nCustomer-premises or VPN scenarios to be considered
  • nAdministrators will want to deploy a uniform numbering plan throughout the Corporate Network (PISN and IP network)
  • nUsers will want number portability between PISN and IP network
  • Need to support PNPs and implicit number plans
  • in the IP network



For more information

John Elwell, Chairman ECMA TC32

Siemens Communications (International) Limited

[email protected]

Christine Cordonnier, Convenor ECMA TC32-TG13 & TG17

Alcatel Business Systems

[email protected]