Japan Registry Service

A Glance at ENUM
AP* Retreat
Feb. 22, 2004
Hiro HOTTA <hotta@jprs.co.jp>

Copyright © 2004 JPRSJapan Registry Service

What is ENUM?
• ENUM is a mechanism for mapping telephone(E.164) numbers to Internet resource address(es)– 1 to many

• Internet resource address(es) are specified as URI(s).
• Mapping is– Registered using NAPTR records in DNS– referred to by DNS lookup• End users (Applications) can select URI(s)according to their preference
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Japan Registry Service

What is ENUM used for?
Communicationservice• Vocal③PSTN phone③VoIPcommunication

PSTN– PSTN– VoIP③E-mailSIP GW②mailto:taro@example.jp① looks up e-mailmethod for050- 1234-5678②SIP:addr@SIPGW.jp① looks up SIP
method for050- 1234-5678②SIP:addr@example.jp① looks up SIP
method for050- 1234-5678

••
•
•
•

iFAX
E-mailmessenger
voicemail…..

ENUM infrastructure

ENUM 050-1234-5678 ==>sip:addr@example.jp==> mailto:taro@example.jp
registry

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Japan Registry ServiceTechnology• Standardization is being done in– IETF
– ITU

: protocol: procedure of national operation• Standardization in IETF is almost done
– RFC2916bis• draft-ietf-enum-rfc2916bis-07.txt• being reviewed by IESG

• RIPE NCC manages e164.arpa for _formal_ ENUM
DNS space in cooperation with ITU-T• Several countries/economies are doing ENUM trials– Subspace delegated to countries/economies
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Japan Registry Service

E.164 number to domain name conversion
1.

Check if E.164 is complete.
•2.

Remove all non-digit except for leading ‘+’.
•3.

8.1.3.5.2.9.7.2.5.7.1Reverse the order of the digits.
•6.

81352972571

Put dots (“.”) between each digit.
•5.

+81352972571

Remove leading ‘+’.
•4.

Ex. +81-3-5297-2571

1.7.5.2.7.9.2.5.3.1.8

Append the string “.e164.arpa” to the end.
•

1.7.5.2.7.9.2.5.3.1.8.e164.arpa

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Japan Registry ServiceENUM Services••

Must be published as RFC and registered to IANA.
Expected ENUM services, protocols.
Service/Protoclservice field

URI Scheme (EX)

SIP
H.323
InternetFAX
Telephone
FAX
EmailWEBE2U+sip
E2U+h323
E2U+ifax
E2U+telE2U+fax:tel
E2U+email:mailto
E2U+web:httpsip:info@sip.jprs.co.jp
h323:info@h323.jprs.co.jp
mailto:fax@fax.jprs.co.jp
tel:+81352972571;svc=voice
tel:+81352972571;svc=fax
mailto:info@jprs.co.jp
http://jprs.jp/Copyright © 2004 JPRS

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Japan Registry ServiceIssues• Future vision, business model– Operator ENUM / User ENUM / other models?
– Management Entity, responsibility– Charge• DNS operation– Tier structure– DNS server distribution– Provisioning of NAPTR records• Application software development– ENUM client• Relation with other applications, such as E-Mailer, SIP phone, etc
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Japan Registry ServiceIssues (cont.)• Security– DNS data
– ENUM provisioning– User communication (application level)• Privacy– End user data (whois)– Trace of the user behavior• Regulation– ENUM numbering plan
– Guarantee of quality of service
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Japan Registry Service

What is Delegation?
•Delegation of a Telephone number space for
ENUM Trial.
arpa– Telephone numbers under a country code (ex. 81for Japan) shall be delegated to and managed bysome organization authorized by the corresponding
government•Procedure– An organization negotiates with the government tobecome a delegee of the number space– The organization sends a request for delegation toRIPE NCC– RIPE NCC asks ITU-T for authorization to makesuch delegation (= NS delegation) under e164.arpa– ITU-T asks the corresponding government forendorsement of the delegation– The government endorses the delegation– Delegation is reflected (under e164.arpa) on DNS
Copyright © 2004 JPRS

jpcom

e164
8414Japan

UK

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Delegations to countries/economies

as of Feb.20, 2004

E.164 CCCountry

Delegee

Date of Approval

246

Diego Garcia

Government

12/08/02

247

Ascension

Government

12/08/02

290

Saint Helena

Government

12/08/02

31

Netherlands

Ministry

23/05/02

33

FranceDiGITIP (Government)

28/03/03

358

FinlandFinnish Communications Regulatory Authority

26/02/03

36

Hungary

CHIP/ISzT

15/07/02

374

Armenia

Arminco Ltd

11/07/03

40

Romania

MinCom10/12/02

41

Switzerland

OFCOM

01/10/03

420

Czech Republic

Ministry of Informatics

24/06/03

421

Slovak Republic

Ministry of Transport, Post, and Telecommunications

04/06/03

423

Liechtenstein

SWITCH

21/10/03

43

AustriaRegulator

11/06/02

44

UK

DTI/Nominum

16/05/02

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Japan Registry Service

Delegations to countries/economies (continued)
E.164 CCCountry

Delegee

Date of Approval46

SwedenNPTA

10/12/02

48

PolandNASK

18/07/02

49

Germany

DENIC

16/05/02

55

BrazilBrazilian Internet Registry

19/07/02

65

Singapore

IDA (Government)

04/06/03

86

China (c)CNNIC

02/09/02

878 10(a)VISIONng

16/05/02

971

United Arab EmiratesEtisalat

13/01/03(b)

NeuStar02/02/01

991 001

Notes:(a)This is a Universal Personal Telephony (UPT) code.
(b)This is a trial code granted to NeuStar for a limited period. The period expires on 28 May 2004.
(c)
This is a temporary authorization for ENUM global TLD trial and evaluation. This delegation willend on 30 June 2004. If the ITU Interim Procedure is discontinued before then, or if the Recommendation
E.A-ENUM is approved before 30 June 2004, the delegation will be turned into an objection.

http://www.itu.int/itudoc/itu-t/enum/enum-app_ww9.doc
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Japan Registry ServiceDelegations (summary)• 24 delegations– Europe: 15– Asia: 2 (Singapore and China)– Middle east: 1– Latin America: 1– Islands, archipelago: 3– Beyond-CC experiment: 2Copyright © 2004 JPRS

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Japan Registry ServicePatterns of Trial Organizations
Intuitive classification• Led by organization created for the trial– Registry, regulator, telco, vendor, ISP, …
– Austria, UK, Netherlands, Sweden, Japan, … (many)• Led by ccTLD– ccTLD plays the leading role of the trial– Germany, Korea, …

• Led by regulator (government)– Registry, telco, and others are members of the trial– China, Singapore• Led by a company entrusted by regulator (government)– Armenia, islands,• Led by entrusted ccTLD registry of another country– Lichtenstein (led by .ch registry SWITCH)
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Japan Registry ServiceActivities in Europe• 2 trials very often exposed– Austria• Leading technology trials• ENUM tutorials and demonstrations inRIPE/CENTR/IETF/…
• Support for ENUM implementation in Asterisk (IP PBX)

– UK
• UKEG and UKETG for study and trials– Telcos, registries, DNS providers, …
– Members from inside and outside of UK• Netherlands. Sweden, Germany, Poland, …
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Japan Registry ServiceActivities in Asia Pacific• Many countries/economies are doing some activities– Korea– China– Taiwan– Japan– Singapore– Australia– ….

(sorry…. I’m sure I miss someone else)• ENUM BoF : 6-9pm on Wednesday Feb.25

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Japan Registry ServiceSummary• Standardization in IETF is almost done
• Trials are under way in many countries/economies– Especially in Europe and east Asia
– Commercial operation is about to start in a few countries

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Japan Registry ServiceURIs• IETF ENUM WG– http://www.ietf.org/html.charters/enum-charter.html• ITU-T ENUM Web page
– http://www.itu.int/ITU-T/inr/enum/• National trials– Austria : http://enum.nic.at/– UK : http://www.ukenumgroup.org/– Taiwan : http://www.enum.org.tw/– Korea : http://www.enum.or.kr/– Japan : http://etjp.jp/Copyright © 2004 JPRS

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