1. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -1 Numbering / Addressing in Private Integrated Services Networks (PISN)

2. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -2 An International Europe-based Industry Association for Standardizing Information and Communication Systems Objective ã Development and promulgation of standards and technical reports for information and communication systems With Direct Outlets on International and European Levels Õ ISO/IEC JTC 1 Õ CEN, CENELEC, ETSI Background to ECMA

3. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -3 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

4. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -4 Standardizing Information and Communication Systems TC32 Communication, Networks and Systems Interconnection TG13 – Corporate Networks – Network Architecture, Numbering, Naming and Addressing TG17 - IP-based multimedia communications Responsibility for corporate networks, including QSIG protocol, mobility support, addressing, numbering, management, CTI etc.

5. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -5 ECMA TC32-TG13 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

6. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -6 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

7. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -7 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.164 numbers, e.g., where DDI is available.

8. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -8 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

9. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -9 ECMA TC32-TG17 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

10. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -10 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

11. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -11 ECMA TC32 Requirements Numbering / Addressing in CN - Impact on IP telephony Part of a Corporate Network may comprise an IP network that supports telephony (IP telephony) è Requirements n Customer-premises or VPN scenarios to be considered n Administrators will want to deploy a uniform numbering plan throughout the Corporate Network (PISN and IP network) n Users will want number portability between PISN and IP network è Need to support PNPs and implicit number plans in the IP network

12. IP-Telecoms Interworking Workshop Geneva 25-27 January 2000 Page -12 For more information www.ecma.ch helpdesk@ecma.ch John Elwell, Chairman ECMA TC32 Siemens Communications (International) Limited john.elwell@siemenscomms.co.uk Christine Cordonnier, Convenor ECMA TC32-TG13 & TG17 Alcatel Business Systems cc@sxb.bsf.alcatel.fr