Japan Registry Service

ENUM Trial in Japan
NGI2 & IPv6 DNS Operation Workshop
5 Dec 2003
Yoshiro YONEYA <yone@jprs.co.jp>

Copyright © 2003 JPRSJapan Registry ServiceBackground

Copyright © 2003 JPRSJapan Registry Service

Typical ENUM world
SIP Server

IP Network

MGW

Internet
PSTN

Location Servre Mail, iFax,
SMS, etc.

PSTN

IP Network
ENUM Service
For Telecom carriers

ENUM Service
For Enterprises

ENUM Infrastructure

ENUM Service
For End Users
PBX

Tier1
Registry/Registrar

ENUM
DNS

Tier2
Registry/Registrar
APIENUM
Application

ENUM Application
ENUM Terminal, etc.

Copyright © 2003 JPRSENUM Application
ENUM Terminal, etc.

ENUM Application
ENUM Terminal, etc.

ENUM Registrant/ ASP

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TelecomCarriersJapan Registry Service

ENUM possibilities• End users view:– Unifications of multiple identifiers into one E.164
number.
• Tel#, Fax#, Email address, Web address, etc.

– Increases chance to connect to callee.
• Can be fall back to another URI(s) if line is busy.

• Operators view:– Inter-routing between IP phone carriers.

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Operator ENUM / User ENUM
• Operator ENUM
– Operators (Carriers, ISPs, etc.) set NAPTR to each number theyassigned.
• ENUM services may be limited.

– Used for inter-routing within operators.
– ENUM DNS can be internal to the operators.
• NAPTR RRs can be hidden from users.

• User ENUM
– Users (E.164 number holders) set NAPTRs according to theirdemands.
• Variety of ENUM services can be chosen.

– User must be verified whether appropriate number holder.
• Independent number verification authority is required.

• Operation styles are completely different.
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Tier structure: example 1• Tier1 delegates numberblock(s) to Tier2.

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Tier structure: example 2• Tier1 is layered
according to number plan.
• Tier1 delegates numberblock(s) to Tier2.

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Tier structure: example 3• Tier1 delegates eachnumber to Tier2.
• Easy to provide numberportability.
• Suitable for User ENUM.

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DNS structure design• Depends on which model to select.
• Typical requirements for Tier1 DNS:– Handling of large zone (up to 100M entry).
– Scalability and stability.
– Performance.

• Typical requirements for Tier2 DNS:
– Capability for frequent update.
– Relationship with registry database.
– EDNS0 support.
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Japan Registry ServiceRegistry DB• Tier1:– Frequency of zone generation.
– Zone transfer method to primary DNS.
• Authentication and consistency.

– Interface for Tier2 Registry (or Tier1 Registrar).
• EPP?

• Tier2:– Partial (dynamic) update.
– Interface for User (or Tier2 Registrar).
• Validation of number holder.

– Interface for Tier1 Registry (or Registrar).
• EPP?

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Japan Registry ServiceConsideration for DNS• Typical ENUM services like Web, Mail, SIP are
also lookups DNS.
– Web: Hyper-links(A).
– Mail: sending (MX, A), receiving (PTR).
– SIP: service protocol (D2U/D2T NAPTR), servicelocation(SRV), sip server(A)• DNS queries will increase when ENUM deployed.
• Users are nervous to service quality.
– Users don’t care where is the bottle neck.

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Japan Registry ServiceIssues• Future vision, business model.
– Operator ENUM / User ENUM.
– Management Entity, responsibility.
– Charge.

• DNS operation.
– Tier structure.
– DNS server distribution.
– Provisioning of NAPTR data.

• Application software development.
– ENUM client.
• Relation with other applications, such as 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).
– Anonymity （DNS Data).
– Trace of the user behaviour.

• Regulation.
– ENUM numbering plan.
– Guarantee of quality of service.
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Japan Registry Service

ENUM activities in Japan

Copyright © 2003 JPRSJapan Registry ServiceENUM Study Group•

Established– September 2002.

•Objectives– Understanding the ENUM technology: desk work.
– Finding political/regulatory issues related to ENUM-based
implementation and operation.
– Studying the implementation and operation of the ENUM–based system,
and related matters.
– Finding technological issues related to ENUM.
– Clarifying pros and cons in ENUM usage.

•Target of the study– ENUM technology.
– Related technology such as DNS，URI，DDDS.

•Final report– Published on May 2003 (English translation coming soon).

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Japan Registry Service

ENUM Trial Japan (ETJP)•

Established– on 17 September 2003 (1 year activity).

•Purpose– Perform ENUM trials to ensure functioning and feasibility of basic technicalfacility.
– Demonstration of technology for international use.
– Accumulation of know-how on ENUM and sharing of it among participants.

•Activities– DNS operation for ENUM Trial.
– Feasibility test of communication applications (device, software) using ENUM.
– Feasibility test of communication services.

•Results– Results of technical verification.
• Communication devices and software provided by participants.
• Communication services.

– Clarification and consideration of relevant issues.

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ETJP organization• Participants– Companies, organizations, and individuals who hope to contributeto ETJP activities.
– Number of members: 42 (as of 21 Nov 2003).

• Officers– Chairman• Shigeki Goto
Japan Network Information Center (JPNIC)/Waseda University– Vice chairman• Hirofumi Hotta
Japan Registry Service Co., Ltd.(JPRS)• Yoshiki Ishida
WIDE Project

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ENUM trial (phase1)
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Copyright © 2003 JPRSNPSTS IPile-ma ・・・
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Copyright © 2003 JPRS

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ENUM trial (phase3)
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Layer of ENUM services and standards

Communication service (multiple carriers)
Authentication, Social Security
Communication service (single carrier)
Provisioning, Communication Security
Applications/Terminals
SIP, Mail, Web, etc.
Infrastructure
ENUM DNS
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ETJP Registration system(Phase 1)• Each ETJP member can apply their preferrednumbers as their trial E.164 numbers.
• Verification is performed by each member’s IDand password.

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NAPTR Registration Web I/F(Phase 1)•••

Copyright © 2003 JPRSETJP members can set theirpreferred NAPTR RRs to thetrial DNS through this Web I/F.
Those NAPTR RRs are updated
within a few minutes.
Can be examined via ENUM
client-like Web I/F.

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ETJP applications(Phase 1)• ENUM enabled SIP Proxy (Softfront).
• ENUM enable VoIP Router (Yamaha, CISCO).
• ENUM enabled InternetFAX (Panasonic).

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Japan Registry ServiceReferences• ETJP– http://etjp.jp/• ENUM Study Group– http://www.nic.ad.jp/en/enum/

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Q&A

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