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International Telecommunication Union Telecommuniations Standardization Bureau Geneva January 2000

IP and Telecoms Interworking Workshop N umbering, Naming Addressing and Routing IETF EMUM WG Proposal. International Telecommunication Union Telecommuniations Standardization Bureau Geneva January 2000. Presented By. Representing IETF

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International Telecommunication Union Telecommuniations Standardization Bureau Geneva January 2000

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  1. IP and Telecoms Interworking WorkshopNumbering, Naming Addressing and RoutingIETF EMUM WG Proposal International Telecommunication Union Telecommuniations Standardization Bureau Geneva January 2000 Document IPW-4

  2. Presented By • Representing IETF • Richard Shockey8045 Big Bend Boulevard, Suite 110Saint Louis, Missouri 63119 USA(314) 918.9020 Voice(314) 918.9015 Fax • E.Mail/IFAX rshockey@ix.netcom.com

  3. Problem Statement • How do you link the resources of the GSTN with the resources of the Internet? • How do you find a resource on the Internet if you only have a telephone number [E.164]? • How do you make this simple, easy to use without “reinventing the wheel”?

  4. Solution Proposal – ENUM WG • Put Telephone Numbers into the Global Domain Name System [DNS] • Use proposed NAPTR and SRV Resource Records [RR] to find : • IP Address • E-Mail addresses • SIP / H.323 servers • LDAP directories

  5. Why DNS? • Its there .. • It works .. its global .. it scales .. its fast .. its open. • Why not something else? • X.500 ? • It was the judgment of the IESG to explore the DNS option first.

  6. What ENUM is NOT… • Actual Routing of Phone calls within the terminating application protocol ..what ever that may be. • It is not a “white pages directory service” • Does not list “capabilities” of endpoints – IETF RESCAP WG

  7. “Out of Scope” for ENUM • Provisioning “e164.int” • Propagation • Administration • Service Logic • Carrier Accounting - Reconciliation • Anything to do with “policy”

  8. How does ENUM Work? • Take a fully qualified E.164 number and create a DNS entry in a highly defined and structured domain. • The search for resources associated with 1 314 918-9020 becomes a look up to : 0.2.0.9.8.1.9.4.1.3.1.e164.int • Each digit becomes a definable and distributed “zone” in DNS terms

  9. How does ENUM Work? • Response to query for 2.8.0.4.6.2.6.5.8.6.4.e164.int In this response the prefered contact method is SIP ord pr fl service re replacement IN NAPTR 10 10 "a" "sip+N2R" "" "sip:paf@swip.net”. IN NAPTR 102 10 "s" "potscall+N2R" "" _potscall._tcp.paf.swip.net. IN NAPTR 102 10 "a" "smtp+N2R" "" "mailto:paf@swip.net". In this response the prefered contact method is H.323 IN NAPTR 10 10 "s" "sip+N2R" "" “h323gw.tele3.se. IN NAPTR 102 10 "s" "potscall+N2R" "" _potscall._tcp.paf.swip.net. IN NAPTR 102 10 "a" "smtp+N2R" "" "mailto:paf@swip.net".

  10. ENUM in VoIP Gateways • ENUM allows gateways to find each other. • ENUM is not for routing calls where than one gateway can handle the call. • IPTEL WG – [TRIP] Telephony Routing Information Protocol ( proposed )

  11. ENUM in Universal Messaging • EMA-IETF Voice Profile for Internet Mail [VPIM] • ENUM enables carrier and enterprise Voice Mail systems to interoperate and exchange messages • Retrieve voice mail from anywhere in the world with a local call

  12. ENUM in Fax • Fax is not “dead.” • Fax is a essential global communications service. • Fax number to E-Mail box [IETF RFC 2305-ITU T.37] • Fax number to ITU-T.38 servers • Fax number to Internet Print Protocol servers

  13. ENUM in Local Number Portability • ENUM could be used for Local Number Portability by carriers. • SCP servers could query DNS for available records.

  14. Conclusions “Standards are wonderful…that’s why we have so many of them.” Dr. Herman R. Silbiger ITU SG8/Q4 Rapporteur

  15. The Real OSI Model 9. Political < You are here 8. Financial 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Link 1. Physical Apologies to University of Colorado Engineering Scholarship fund

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