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Chairman’s Report of the ITU ENUM Workshop


Chairman’s Report of the ITU ENUM Workshop


ITU, Geneva - 17 January 2001



 The Chairman (Roy Blane of Inmarsat Ltd., United Kingdom) welcomed the participants to the ITU ENUM Workshop, which had been called to assist in identifying the policy and regulatory implications of the impending commercial implementation of ENUM in order to assist Member States and National Regulatory Authorities to determine the associated operational and administrative issues involved.

 The ENUM Working Group in the IETF has been working on the development of ENUM during the past year in close co-ordination with ITU-T Study Group 2. ENUM is both a distributed database and a protocol.  It has been initially developed to map the E.164 international telephone number to an Internet domain name address.

 The Chairman advised the participants that the aim of the workshop was to:

  • Assist in raising the awareness and understanding of Member States and National Regulatory Authorities with regard to the work which needs to be undertaken to ensure that ENUM can be implemented in an international commercial environment;

  • Identify and consider the administration and management requirements of implementing ENUM

  • Identify issues which still need to be tackled and where possible by whom.

 The Chairman recognized that the schedule for the one-day workshop was ambitious and sought the commitment and understanding of the participants to ensure its success.

 It was agreed that the report and contents of the Workshop would be posted on the relevant section of the ITU web site[1] and that other participating entities, such as the IETF, would be encouraged to disseminate the output of the workshop as appropriate with their working procedures.

 The List of Participants is attached in Annex 1 of this Report.

 Information Presentations

 During the morning session of the workshop four presentations were provided to assist participants in their understanding of the topic and its operational and technical implications. These presentations can be found in Annexes 2 - 5 of this Report as below:

 A glossary of the terms and definitions used in the presentations is provided in Annex 6 of this Report.

 Discussion of Presentation Information and Key Issues Arising

During the afternoon session the workshop focused its attention on discussing and producing a list of key issues, which needed to be tackled in order to allow the successful commercial implementation of ENUM.

 A list of these key issues is attached at Annex 7 of this Report.

 In addition it should be noted that, unless specifically stated, the list of key issues were viewed as being of national importance and therefore required review by each Member State. 

 In order to clarify the reasons for the IAB decision to designate the domain name “” for the purpose of implementing ENUM, Mr. Patrik Fältström of the IETF’s Internet Engineering Steering Group (IESG) provided some additional background information that indicates the basis for this decision. This information is contained in Annex 8.

 According to Annex 8, an agency of the U.S. Department of Commerce requested the redelegation of “.arpa” to the Internet Assigned Numbers Authority (IANA) and this is further reflected in this domain’s “whois record”. The IANA function is performed under a contract[2] dated February 8, 2000 between ICANN and the U.S. Department of Commerce. On January 8, 2001, the U.S. Department of Commerce indicated that it intends to further extend this contract beyond March 31, 2001.[3]

 Some background information papers were made available to the participants at the workshop to enable them to understand in more detail of some of the key issues that were identified. These papers were: 

  • ITU-T SG2 Delayed Document No.15 from France entitled Conditions for Implementation of ENUM[4]

  • ITU-T SG2 Delayed Document No. 20 from AT&T and Neustar entitled ENUM Administrative Processes[5]

  • IETF Internet Draft document from Netnumber entitled Tier-1 ENUM System Roles and Responsibilities[6]

Copies of these documents can be obtained from the respective organizations. Additional ENUM-related information resources are available on the relevant section of the ITU web site.[7]

The following statements were provided by Member States at the end of the meeting for inclusion in the report:

Statement from the Administrations of France, Germany, Belgium, Netherlands, Switzerland, United Kingdom and the European Commission

“We appreciate the effort that the ITU has taken to organise this tutorial on ENUM. 
We take note of the presentations and the discussion.
We will need to take urgent action to identify broad principles for public policy and its implications.”

Statement from the Administration of United States of America

 “The United States appreciates the efforts of the ITU to raise awareness about the ENUM protocol recently developed by the Internet Engineering Task Force (IETF). We note that ENUM is in the nascent stages of emergence and is a matter of active discussion in many communities, including industry. Work has begun in the United States to explore the potential benefits of this new protocol from the perspective of overall principles such as the promotion of competition, innovation, and consumer choice, among other considerations. We will consider the information provided by the workshop in our continuing deliberations.”


 The Chairman thanked the workshop participants for their input and praised the information presenters for their efforts to aid the participants understanding of the issues involved in the development and implementation of ENUM. In addition the Chairman thanked Mr. Robert Shaw of the ITU for his efforts to ensure that the workshop took place. Finally the Chairman thanked Mr. Andrew Gallant of Neustar for volunteering to assist in the production of the list of key issues, in real time, via the overhead projector for the participants.





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