Introduction
1 Scope
2 References
2.1 IETF
2.2 ITU-T
3 Definitions
3.1 General terms
3.2 E.164-specific terms
3.3 ITU-T non-numbering terms
3.4 DNS-specific terms
3.5 ENUM-related terms
4 Abbreviations
5 Background
5.1 What is ENUM
5.2 DNS zones and delegation
5.3 Tiered architecture
5.4 Overview of ENUM functions and entities
6 General administrative issues and
options
6.1 Identification of ENUM Tier 1
registry or registries
6.2 Delegation of names from the ENUM
Tier 1 registry
6.3 Determination of ENUM Tier 2 name
server provider and
ENUM registrars
6.4 Validation of ENUM requests and
records
6.5 Relationships of administrative
structures with ENUM zone structures
6.6 Additional considerations
7 Implications of ENUM for country
codes assigned to geographic areas
7.1 Administration aspects, options
and interfaces
7.2 Review of consequences
8 Summary and conclusion
Annex A – Typical
PSTN-IP call flows using SIP
Annex B – Integrated
numbering plans