Presentation is loading. Please wait.

Presentation is loading. Please wait.

Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Explanation of ENUM (RFC 2916) Patrik Fältström Area Director, Applications Area,

Published byBlanche Miles Modified over 8 years ago

Similar presentations

Presentation on theme: "Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Explanation of ENUM (RFC 2916) Patrik Fältström Area Director, Applications Area,"— Presentation transcript:

1 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Explanation of ENUM (RFC 2916) Patrik Fältström Area Director, Applications Area, IETF

2 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Problem we want to solve 2ENUM

3 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Problem statements How do network elements (gateways, SIP servers etc) find services on the Internet if you only have a telephone (E.164) number? How can subscribers define their preferences for incoming communications?

4 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Today, many addresses tel:+46-8-971234 mailto:paf@example.com tel:+46-706051234 sip:paf@example.com

5 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva With ENUM, only one tel:+46-8-971234 mailto:paf@example.com tel:+46-706051234 sip:paf@example.com tel:+46-706051234 Give this number to friends: +46-8-971234 ENUM

6 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Technical solution 6ENUM

7 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Solution in short Put domain names derived from telephone numbers in the global domain name system, DNS IETF ENUM Working Group created to solve the problem of using the DNS for: –domain name in – [Numbers re-formatted as domain names] –URI out –[mailto, sip, tel, http or other URI scheme] Solution: NAPTR records Use the URI’s for the communication

8 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva ENUM in a nutshell take phone number +46-8-6859131 turn into domain name 1.3.1.9.5.8.6.8.6.4.e164.arpa. return list of URI’s sip:paf@cisco.com ask the DNS mailto:paf@cisco.com

9 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva “Call setup” ENUM use in more detail Sip sip:paf@cisco.com Query 1.3.1.9.5.8.6.8.6.4.e164.arpa.? Dial +4686859131 DNS-Server Sip serverGateway Response sip:paf@cisco.com

10 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Example DNS-Server Internet PSTN Called party Calling party SIP-Server Gateway

11 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva VoIP via SIP to VoIP DNS-Server “ENUM” SIP-Server Gateway

12 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva VoIP via PSTN to PSTN DNS-Server “ENUM” SIP-Server Gateway

13 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Step 1 Take an E.164 number and create a fully qualified domain name in a single highly defined and structured domain +46-8-971234 +468971234 4.3.2.1.7.9.8.6.4.e164.arpa. The input to the NAPTR algorithm

14 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Step 1, Explanation Each digit can become a definable and distributed “zone” in DNS terms Delegation can (doesn’t have to) happen at every digit, including at last digit Zones such as country codes, area codes or primary delegated blocks of numbers can be delegated as well as individual numbers DNS defines authoritative name servers for NAPTR/service resource records

15 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Step 2 Lookup NAPTR RR’s in DNS, and apply NAPTR/ENUM algorithm 4.3.2.1.7.9.8.6.4.e164.arpa. !^.*$!mailto:spam@paf.se! !^+46(.*)$!ldap://ldap.telco.se/cn=0\1! Use rewrite rules using regular expressions which operate on the E.164 number (+468971234)

16 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Regular Expressions For ENUM, the NAPTR regexp field may yield an (unchanged) URL ! ! ! –“Match on original E.164, and apply rewrite rule ” ^ - Match beginning $ - Match end. - Match any character.* - Match any number of any character () - Grouping, \n in is replaced with group number ‘n’ in

17 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Step 2 in detail $ORIGIN 4.3.2.1.7.9.8.6.4.e164.arpa. IN NAPTR 10 10 ”U” ”mailto+E2U” ”!^.*$!mailto:spam@paf.se!” IN NAPTR 20 10 ”U” ”ldap+E2U” ”!^+46(.*)$!ldap://ldap.telco.se/cn=0\1” Note that no line break should be in the records

18 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Status / Issues

19 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva RFC 2916 published in September 2000 The domain e164.arpa delegated to RIPE NCC –RIPE NCC appointed by the IAB according to RFC 2916 ITU SG2/WP1/2 liaison statement: –Member state can inform ITU on entry of numbers in ENUM tree Status (done)

20 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Status (done) Instructions to RIPE NCC –Any “request” not coming from TSB is to be forwarded to TSB –If TSB says no, no delegation is to be done –All evaluation of any “request” is to be done by TSB –RIPE NCC is only creating and evaluating the technical data which they need for the actual delegation –RIPE NCC is to communicate with TSB –RIPE NCC is to make public any communication regarding a “request”

21 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Status (not done) Delegation of domains below e164.arpa to managing entities that are appointed by member states –A few “requests” have been passed to TSB, which have responded very quickly National issues are not resolved –We have not heard that issues related to verification of holder of E.164 number are resolved anywhere

22 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Issues

23 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Issue 1: Competition The DNS requires a unique root –More on this later In DNS, we have a question on how to have competition in general, since one commercial company “had too large a market share” Competition for registrations of DNS records is ensured using a registry/registrar model: –One registry which runs the DNS server Competition at this level is handled when choosing the registry, because that can only be one organization –Many registrars which the customer talk with Registrars decide for example price for a registration

24 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Issue 2.1: Unique root Why is a unique root used in ENUM? –Say I have phone number +468971234 –I can choose between a.com and b.com –I choose b.com, and get the DNS domain 4.3.2.1.7.9.8.6.4.b.com. –Axel is to call me –He knows my phone number, +468971234, only –How is he to know that it is in b.com and not a.com I have my data? General issues in RFC 2836 We need a “Golden Tree” for E.164 numbers

25 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Issue 2.2: Selection of root Address and Routing Parameters Area See contribution from ISOC See http://www.iana.org/arpa-dom/ –in-addr.arpa IPv4-addresses –ip6.arpa IPv6-addresses –e164.arpa E.164 numbers

26 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Issue 3: Alternatives? The implementation of a globally unique ENUM tree provides ample opportunity for competition at the national level Having ENUM using domain e164.arpa means that one still have: 1. Ability to have dialing plans in other domains 2. Competition regarding registration according to registry/registrar model on all levels in DNS tree 3. Competition when selecting the registries 4. Competition regarding services

27 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva 3.1 Alternative Dial plans A user very seldom dial an E.164 number on his phone Inside Cisco, people dial 58509 to me Outside Cisco, from Sweden, people must dial 0014085258509 Not all dialed numbers are E.164 numbers People use dialing plans Dialing plan information can be resolved by the use of same technology as ENUM

28 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva 3.2 Registry / Registrar A registry runs the DNS server for a specific domain name –one domain -> one registry A customer contacts a registrar when he want to have things registered, not the registry Registrar verify customer data, do billing, and send data to registry when delegation is to be done, changed or cancelled See next slide…

29 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva 3.3 Selection of registry Registries are needed which runs the DNS –On a country code level –Inside a country code, according to local policy The model we use today with DNS is Holder of a domain Registry Registrar Registrant Holder of a domain

30 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva 3.4 Services A customer in ENUM announces what services he subscribes to –Examples: Email Web homepage SIP service (VoIP) Telephony Each one of these services can be handled by separate contracts between customer and service provider These contracts have nothing to do with the announcement via ENUM of their existence

31 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva The big picture… RIPE-NCCIETF/IAB Registry for country Registrar for country ENUM Service provider Customer Service provider for telephony Service provider for email Service provider for email Service provider for email Service provider for telephony Service provider for telephony ITU-T TSB

32 Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Patrik Fältström paf@cisco.com

Download ppt "Patrik Fältström. ITU Tutorial Workshop on ENUM. Feb 8, 2002, Geneva Explanation of ENUM (RFC 2916) Patrik Fältström Area Director, Applications Area,"

Similar presentations

AG Projects Miami - June 2005 ENUM Tier 2 Provisioning techniques Linking ENUM with external systems Adrian Georgescu AG Projects.

AG Projects Miami - June 2005 ENUM Tier 2 Provisioning techniques Linking ENUM with external systems Adrian Georgescu AG Projects.
ENUM Overview – July 2003. The ENUM Objective Mapping PSTN addresses into the IP world ENUM allow any IP device to establish whether an E.164 telephone.

ENUM Overview – July The ENUM Objective Mapping PSTN addresses into the IP world ENUM allow any IP device to establish whether an E.164 telephone.
Implications of ENUM Geoff Huston Office of the CTO September 2002.

Implications of ENUM Geoff Huston Office of the CTO September 2002.
Tekelecs opinion on Change orders NANC 400 and NANC 401 ENUM.

Tekelecs opinion on Change orders NANC 400 and NANC 401 ENUM.
International Telecommunication Union ENUM Issues and Solutions Houlin Zhao Director Telecommunication Standardization Bureau International Telecommunication.

International Telecommunication Union ENUM Issues and Solutions Houlin Zhao Director Telecommunication Standardization Bureau International Telecommunication.
ENUM Technical issues / DNS

ENUM Technical issues / DNS
ENUM Call Flow Scenarios

ENUM Call Flow Scenarios
2/12/2001 ENUM Administration Penn Pfautz AT&T 732-420-4962

2/12/2001 ENUM Administration Penn Pfautz AT&T
Support and Transparent Process for ENUM Designated Zone implementations for the USA Before the Dept of State ITAC-T Advisory Committee SG-A AdHoc Meeting.

Support and Transparent Process for ENUM Designated Zone implementations for the USA Before the Dept of State ITAC-T Advisory Committee SG-A AdHoc Meeting.
ENUM Administration Issues

ENUM Administration Issues
Slide title In CAPITALS 50 pt Slide subtitle 32 pt Infrastructure ENUM David Seaton Director Product Marketing Ericsson.

Slide title In CAPITALS 50 pt Slide subtitle 32 pt Infrastructure ENUM David Seaton Director Product Marketing Ericsson.
ENUM & VoIP numbers governments perspective Thomas de Haan Policy Coordinator Ministry of Economic Affairs 14 October 2005 The Hague.

ENUM & VoIP numbers governments perspective Thomas de Haan Policy Coordinator Ministry of Economic Affairs 14 October 2005 The Hague.
Carrier/Infrastructure ENUM Requirements draft-lind-infrastructure-enum-reqs-01.

Carrier/Infrastructure ENUM Requirements draft-lind-infrastructure-enum-reqs-01.
ENUM Trial Implementation and results ENUM Workshop ETSI HQ Sophia Antipolis, France February 2004.

ENUM Trial Implementation and results ENUM Workshop ETSI HQ Sophia Antipolis, France February 2004.
International Telecommunication Union ITU Perspective on ENUM Robert Shaw ITU Internet Strategy and Policy Advisor ICANN Rio de Janeiro, Brazil March 25,

International Telecommunication Union ITU Perspective on ENUM Robert Shaw ITU Internet Strategy and Policy Advisor ICANN Rio de Janeiro, Brazil March 25,
UK ENUM Jay Daley, Nominet UK. ENUM explained Nominet and ENUM.

UK ENUM Jay Daley, Nominet UK. ENUM explained Nominet and ENUM.
ENUM Chris Wong Converging Services Branch International Training Program 7 September 2006.

ENUM Chris Wong Converging Services Branch International Training Program 7 September 2006.
|. Introduction  Quality needs time in education as in science – to teach more about new technologies – to find new services in the IT-landscape – to.

|. Introduction  Quality needs time in education as in science – to teach more about new technologies – to find new services in the IT-landscape – to.
Understanding ENUM & Current Status Network Planning August 21, 2001

Understanding ENUM & Current Status Network Planning August 21, 2001
ENUM Primer November 4, 2004 Tom McGarry - NeuStar

ENUM Primer November 4, 2004 Tom McGarry - NeuStar

Similar presentations

Ads by Google