1. IP Network Clearinghouse Solutions ENUM IP-Enabling The Global Telephone Directory Frank Estes Vice President 770.671.1888, ext 224 festes@transnexus.com

2. What is ENUM? IETF Standard, RFC2916. Method to use Domain Name System (“DNS”) to map E164 numbers to Uniform Resource Locators (“URL’s”). In English, a registry database/s where a server can identify Naming Authority Pointer Records (“NAPTR”) which can find end points being requested by the calling/requesting party. An example from today would be a call to directory service for a listing, which then connects you to whom you are calling. One method for convergence of the PSTN and the IP data networks.

3. ENUM Goals Resolve telephone numbers to URL’s Scalable and comparable to PSTN quality Able to insert information in case of queries Secure updates and changes Address local number portability in ENUM

4. ENUM Goals Not Protocol specific, or only for a specific service (mobile) Intelligent responses to queries are not part of the standard Eventual uses of ENUM not known and dependent of future standards work (one number per subscriber, etc.).

5. Proposed IETF Architecture Country Code Registry RIPE NCC Competitive Registrar Competitive Registrar Competitive Registrar Service Provider END USERS Tier 0 Tier 1 Tier 2 Tier 3

6. Proposed Commercial Architecture DNS Server Commercial authority Internet Personal Computer Application Server 1 1 End user types an E164 number into a Web Browser, Service Provider changes to a DNS query. 2 2 DNS query goes to (Neustar/ NetNumber for a fee and finds a record associated with that particular number. 3 3 End user receives fax, email, call! Service Providers

7. Administrative Issues (Concerns) Changes in End User Information - Cancellation of service - Changes of Service Providers - Change by customer of telephone number Changes in Service Provider Information - Changes of in Registrars - Service Provider A and Service Provider B do not have a bi-lateral agreement, who handles $. All E-164 numbering plans are not created equal

8. A Real Life Example The PTT’s are the Registry POP IP Entrance Managed Bandwidth To Customers POP Data Network Major IP Backbone router IP Gateways -- Core network router IP Gateways router Cust Care Servers End User Cust. Care Servers router Managed Bandwidth To Customers Managed Bandwidth To Customers Managed Bandwidth To Customers POP Registry

9. How ENUM Type Service Works Today!

11. The Constraining PSTN Today, service providers maintain two distinct and separate networks; one for delivering data traffic and another for voice traffic. Each network requires its own equipment, circuits and customer care systems. However, the declining economy and lack of capital investments budgets are causing carriers to look at core transport models and a single point of access for data, voice and other new communication mediums. Carriers are seeking to: - operate one network; - consolidate voice and data traffic; - deliver new services to their customers quickly and efficiently, and; - move the higher margin voice traffic onto the existing, lower cost IP networks

12. The New Public Network ON -NET High Speed, Optical Core POP POP = POP or CO CUSTOMERSCUSTOMERS Data PSTN DSL ATM Secure DNS OFF NET VOICE/DATA VOICE Partner OFF NET DATA/VOICE PUBLIC INTERNET

13. “The Carriers Ideal World” Customer Management database Policy and routing intelligence PSTN IP Data Network Security, Signaling Routing and Provisioning Voice and Data Billing Systems Billing, Profit analysis Trend/ASR reporting Packet Voice Network Wireless Network Usage Reporting O N E A C E S P T.

14. What will the NGN Really BE? Open architecture design running on UNIX (Server type box). Remote maintenance and diagnostic capabilities with server farm redundancy. Remote centralized management will be key to success. New features added in layers by software, not additional and complex hardware. Reduces network complexity and people required to maintain. Open API’s for new service creation and customer care/ provisioning. Scalable using the server farm or other reliability model. New subscribers in real time. Supports legacy equipment for next 15 years. Built for secure interconnect, not one giant network!