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© 2011 CC1 ENUM LLC
ENUM
CTU Ministerial ICT Strategic Seminar
Jim Baskin, Chairman – ENUM LLC
9 February, 2011
© 2011 CC1 ENUM LLC
PSTN PSTN
Converged Networks
ENUM
© 2011 CC1 ENUM LLC
End-User and Provider ENUM
End-user information is placed in a public ENUM registry only if the end user of the number opts in
End-user ENUM information is controlled by the number assignee
Provider ENUM is managed by the operators Provider (Carrier/Infrastructure) ENUM supports
IP interconnection among Service Providers Provider ENUM is a private registry that gives
routing information to originating operators without exposing end-user information
© 2011 CC1 ENUM LLC 4
Public Registry
1.e164.arpa
Tier 0 e164.arpa
Registrant (user) Registrar
Authorization?
End-User (Public) ENUM
User User
© 2011 CC1 ENUM LLC
Provider ENUM
Service
Provider
of Record
Provider
ENUM
Registry
LERG
NPAC
Tier
0/1
Tier 2
Authorization
Call
Originating
Service
Provider Gateway
Tier 0/1
Copy
© 2011 CC1 ENUM LLC
Provider ENUM Data Authentication For U.S. numbers, LERG and NPAC data will be checked as each number is provisioned. Continuous monitoring of LERG & NPAC updates will ensure that changes in number assignments are reflected.
Registry
LERG and
NPAC
T0/1
Validation
Provisioning Zone Data
SPR
© 2011 CC1 ENUM LLC
Global Tree Approach
Use an agreed-upon established domain apex (root)
T0
T1 T1 T1
© 2011 CC1 ENUM LLC
Global Solution
Tier 1 Tier 2
Tier 2
Tier 1
Tier 2
Tier 2
Tier 1
Tier 2
Tier 2
Global Tier 0 CC1 ENUM LLC
Provider ENUM
Tier 2
Tier 1
Tier 2
Tier 2
Tier 1
Tier 2
Tier 2
Tier 0
© 2011 CC1 ENUM LLC
What it means to carriers
Increased efficiency
Support for multiple services
Solid operating model
Significant per-call control & flexibility
Data/Network security
Clearly defined processes
Global solution
© 2011 CC1 ENUM LLC
The Importance of ENUM to Regulators
Telephone numbers mapped into the IP space
PSTN-IP interworking
Transition to converged networks and services
© 2011 CC1 ENUM LLC
Numbering Considerations
In telecommunications – regulatory involvement (number assignment, portability, consumer protection)
National regulatory/numbering authorities coordinate the allocation of E.164 resources
On the Internet – management of naming and addressing is private-sector based
© 2011 CC1 ENUM LLC
Why a Common Solution is Important
All telecommunications industry segments are looking for IP interconnection solutions
Individual groups of service providers are investigating proprietary solutions
However, such “Islands of ENUM” would require additional layers of interworking to provide effective, efficient national and global service
Building these additional interworking bridges can be avoided if we can reach a consensus on a standard Provider ENUM solution
© 2011 CC1 ENUM LLC
Next Steps
Bring all of the North American service providers to the table to learn more about Provider ENUM and consider its suitability as a unified solution for all segments of the industry – Wireline, Wireless, and Cable.
Consideration of functional and interoperability testing opportunities
Discussion of global interoperability alternatives
© 2011 CC1 ENUM LLC
Thank you
