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ENUM Administration

ENUM Administration. Penn Pfautz Ppfautz@att.com. ENUM Administration. Mixes domain registration and telephone number administration Major issues: Authentication of rights to number Disconnect notification Telephony service specific records. ENUM Hierarchy. e164.arpa (RIPE).

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ENUM Administration

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  1. ENUM Administration Penn Pfautz Ppfautz@att.com draft-pfautz-yu-enum-adm-00.

  2. ENUM Administration • Mixes domain registration and telephone number administration • Major issues: • Authentication of rights to number • Disconnect notification • Telephony service specific records draft-pfautz-yu-enum-adm-00.

  3. ENUM Hierarchy e164.arpa (RIPE) $ORIGIN e164.arpa. 1 IN NS nsnanp_enum.com 4.4 IN NS sweden_enum.com . ... Tier 1 – defined by ITU member state nsnanp_enum.com (1.e164.arpa) 4.4.e164.arpa Sweden $ORIGIN 3.7.9.1.e164.arpa. 7.8.7.6.6.3.2 IN NS e164.att.net. 8.8.7.6.6.3.2 IN NS joes-enum.com Tier 2 – Service Registrar e164.att.net $ORIGIN 7.8.7.6.6.3.2.3.7.9.1.e164.arpa. IN NAPTR 10 10 "u" "sip+E2U" "!^.*$!sip:sdlind@sip.att.com!" . IN NAPTR 102 10 "u" "mailto+E2U" "!^.*$!mailto:sdlind@att.com!" . IN NAPTR 102 10 "u" "tel+E2U" "!^.*$!tel:+19732366787!" . Tier 3 – Application Service Provider draft-pfautz-yu-enum-adm-00. sip.att.com

  4. Authentication of Rights to Number • Rights to ENUM domain tied to number assignments in the PSTN • Generally, telephone service provider is only party that knows • Design issue for industry & regulators: How to balance this need with burden on TSP? draft-pfautz-yu-enum-adm-00.

  5. Disconnect Notification • Rights to number in ENUM lost when service on number is disconnected • Again, only TSP knows draft-pfautz-yu-enum-adm-00.

  6. Telephony Service Specific Records • Are there services for which the TSP should have right to put records in ENUM? • How can TSP control records in Tier 2 of end user choice? • How might these records be distinguished? • Alternative is to treat TSP like any other application service provider • Ability of TSP to populate ENUM for customer will facilitate penetration draft-pfautz-yu-enum-adm-00.

  7. ENUM Administrative ProcessReference Model James Yu, NeuStar, Inc. December 14, 2000 draft-pfautz-yu-enum-adm-00.

  8. x.x.x.1. e164.arpa y.y.y.1. e164.arpa ENUM DNS Hierarchy in the US e164.arpa Based on country-code 1.e164.arpa Non-US NPAs US NPAs Tier 1 (US) ... ... 4.3.2.1.3.3.5.2.0.2.1. e164.arpa->y1.com z.z.z.1. e164.arpa 4.3. 2.1.3.3.5.2.0.2.1. e164.arpa->NAPTRs (ldap://ldap.z1.com) Tier 2 Legend DB Database LDAP Lightweight Directory Access Protocol NPA Numbering Plan Area Tier 3 (Depending on the application) LDAP DB draft-pfautz-yu-enum-adm-00.

  9. Reference Model I (General) Legend ASP Application Service Provider TIE Tier 1 Entity T2E Tier 2 Entity TSP Telephony Service Provider T1E T2E A H ** End User can be the end user itself or an agent authorized to represent the end user. ** TSP can offer application services also. The “TSP” entity performs functions specific to the TSP. B C T2E End User F G E D TSP ASP draft-pfautz-yu-enum-adm-00.

  10. End User Changes T2E Steps 1. End User asks a new T2E (T2En) to host all his NAPTR RRs. 2. T2En verifies End User info. and informs T1E about T2E assignment for the TN. 3. T1E confirms the T2E change for the TN with the old T2E (T2Eo). 4. T1E sends T2Eo info. for the TN to T2En. 5. T2En retrieves all the NAPTR RRs from T2Eo and make the necessary changes. 6. T2En informs T1E to activate the pointer for the TN to T2En. 7. T1E sets the pointer to T2En for the TN and acknowledges the activation with T2En. 8. T1E informs TSP about T2E change for the TN. 9. TSP may interact with T2En to make changes to its NPPTR RRs. 3 T1E T2Eo 4,7 5 8 2,6 TSP T2En 9 1 End User draft-pfautz-yu-enum-adm-00.

  11. End User Changes TSP Steps 1. End User wants to port his TN to a new TSP (TSPn). 2. TSPn contacts T1E for the ENUM service for the TN, provides its default T2E info., and receives End User-selected T2E info. 3. T1E informs T2E about TSP change and TSPn’s default T2E info. 4. TSPn interacts with T2E to provision its NAPTR RRs, or T2E retrieves the NAPTR RRs from TSPn’s default T2E. 5. In synchronization with the activation for the ported TN, T1E informs T2E to switch to TSPn’s NAPTR RRs. T1E 3,5 2 TSPn T2E 4 1 End User draft-pfautz-yu-enum-adm-00.

  12. Reference Model II (T2E=TSP) T1E Legend ASP Application Service Provider TIE Tier 1 Entity T2E Tier 2 Entity TSP Telephony Service Provider A’ B’ T2E/TSP End User ** End User can be the end user itself or an agent authorized to represent the end user. ** TSP can offer application services also. The “TSP” entity performs functions specific to the TSP. E’ C’ D’ ASP T2E/TSP draft-pfautz-yu-enum-adm-00.

  13. Next Steps • Enhance the reference model to include • Number portability administrator • New entities that are related to • Non-geographic numbers • Non-US environment • Others • Generalize the names in the reference model to represent their roles in the ENUM administrative process draft-pfautz-yu-enum-adm-00.

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