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Worldcom contribution

 

Contribution #______

 

Ad Hoc US Study Group A ENUM

Contribution

 

 

 

SOURCE:      Worldcom

 

 

CONTACT:    Stephen J. Engelman          

2400 N. Glenville Road

Richardson, Tx 75082

972- 729 -5168                    

                        Stephen.Engelman@wcom.com

 

                        Robert Freilich

                        2400 N. Glenville Road

                        Richardson, Tx 75082

                        972 – 729 – 5139

                        Robert.Freilich@wcom.com

                       

 

DATE:                        March 28, 2001

 

 

TITLE:             E164.arpa and Tier 1 Registries discussion

 

 

 

NOTICE

This contribution has been prepared by WorldCom to assist Ad Hoc SGA in its discussions, and it should not to be considered a binding proposal on

WorldCom or any of its representatives. 

WorldCom reserves the right to change, amend or withdraw this

contribution at any time.



 General

 

The following are discussion points on some of the issues raised at the February SG A ENUM meeting:

 

SG A Queston : Should E.164.arpa be an implemenation of ENUM in the US?

 

Comment: Yes, if there is to be an ENUM  implementation in the US, then the e164.arpa domain should be the single root for ENUM service. Alternatively, implementations using multiple root servers should not be considered due to performance issues associated with multiple ENUM lookups.

 

Figure 1 depicts a potential US ENUM DNS structure using the 1.e164.arpa DNS.

 

 

Figure 1 Potential US ENUM DNS Implementation

 

 SG A Queston: What are the implications for other countries in the NANP?

 

Comment: Canada and the NANP Carribean countries could participate in a US Tier 1 structure, or they could alternatively provide their own Tier 1 DNS. Should Canada or the NANP Carribean countries decide to have their own Tier 1 DNS, then the e164.arpa domain will need to have a 1+NPA table for routing to the US, Canadian or Carribean Tier 1 domains.

 

SG A Question: Should there be multiple Tier 1 Registries (1.E164.arpa) in the US (e.g. regionalization of Tier 1 domains based on area code with no area code in more than one Tier 1)?

 

Comment: It is premature to determine if its desireable to have multiple Tier 1 Registries. Descriptions of Tier 1 and Tier 2 functional requirements and administrative issues need to be developed and understood prior to making this decision.

 

 

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