enum administration n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
ENUM Administration PowerPoint Presentation
Download Presentation
ENUM Administration

Loading in 2 Seconds...

play fullscreen
1 / 13

ENUM Administration - PowerPoint PPT Presentation


  • 73 Views
  • Uploaded on

ENUM Administration. Penn Pfautz AT&T 732-420-4962 ppfautz@att.com. ENUM Administration. Mixes domain registration and telephone number administration Rights to ENUM domain tied to corresponding number assignment in the PSTN

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'ENUM Administration' - carter


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
enum administration

ENUM Administration

Penn Pfautz

AT&T

732-420-4962

ppfautz@att.com

enum administration1
ENUM Administration
  • Mixes domain registration and telephone number administration
    • Rights to ENUM domain tied to corresponding number assignment in the PSTN
    • Rights to number in ENUM lost when service on number is disconnected
    • Generally, telephone service provider is only party that knows about number assignments & disconnects
    • Design issue for industry & regulators: How to balance need for TSP involvement with burden on TSP and a competitive environment?
slide3

ENUM Hierarchy

e164.arpa (RIPE-NCC)

$ORIGIN e164.arpa.

1 IN NS nsnanp_enum.com

4.6 IN NS sweden_enum.com .

...

Tier 1 – Registry- defined by ITU member state

nsnanp_enum.com

(1.e164.arpa)

4.6.e164.arpa

Sweden

$ORIGIN 3.7.9.1.e164.arpa.

7.8.7.6.6.3.2 IN NS e164.att.net.

8.8.7.6.6.3.2 IN NS joes-enum.com

Tier 2 – Service Registrar

e164.att.net

$ORIGIN 7.8.7.6.6.3.2.3.7.9.1.e164.arpa.

IN NAPTR 10 10 "u" "sip+E2U" "!^.*$!sip:sdlind@sip.att.com!" .

IN NAPTR 102 10 "u" "mailto+E2U" "!^.*$!mailto:sdlind@att.com!" .

IN NAPTR 102 10 "u" "tel+E2U" "!^.*$!tel:+19732366787!" .

Tier 3 – Application Service Provider

sip.att.com

e164 arpa
e164.arpa
  • .arpa TLD since infrastructure
  • RIPE NCC will host
  • Essentially populated with identities of name servers for country codes
  • ITU indicates to RIPE authority for each country code
tier 1 registry
Tier 1 (Registry)
  • Entries point to Service Registrar for a number
  • Provider(s) determined by national authorities
    • NANP-wide or per NANP nation?
  • Because of number portability, Tier 1 name server must point to Service Registrar on an individual number basis; numbers can’t simply be delegated to the carrier to which their Central Office code or thousands block was initially assigned
tier 2 service registrar
Tier 2 (Service Registrar)
  • Hosts NAPTR (service) records for a telephone number
  • All records for a given number must be in one name server
  • Major issue is who can be Service Registrar
    • Two “strawman” models presented to IETF
      • Any properly accredited domain name registrar (model I)
      • Telephone service provider (model II)
reference model i general
Reference Model I (General)

Legend

ASP Application Service Provider

TIE Tier 1 Entity (Registry)

T2E Tier 2 Entity (Registrar)

TSP Telephony Service Provider

T1E

New T2E

A

H

** End User can be the end user itself or

an agent authorized to represent

the end user.

** TSP can offer application services

also. The “TSP” entity performs

functions specific to the TSP.

B

C

T2E

End User

F

G

E

D

TSP

ASP

reference model i pros cons
Reference Model I – Pros & Cons

Pros:

  • EU determines T2E, EU has more control
  • EU can be T2E (e.g., universities and enterprises) for his/her own TN(s)
  • Enable competitive T2E service offering

Cons:

  • More complicated interactions among involved entities
  • More efforts at T2E to manage the NAPTR RRs
reference model ii t2e tsp
Reference Model II (T2E=TSP)

T1E

Legend

ASP Application Service Provider

TIE Tier 1 Entity (Registry)

T2E Tier 2 Entity (Registrar)

TSP Telephony Service Provider

A’

B’

T2E/TSP

End User

** End User can be the end user itself or

an agent authorized to represent

the end user.

** TSP can offer application services

also. The “TSP” entity performs

functions specific to the TSP.

E’

C’

D’

ASP

New T2E/TSP

reference model ii pros cons
Reference Model II – Pros & Cons

Pros:

  • Fewer interfaces to deal with
  • Easier to verify EU’s identity and ownership of the TN
  • More incentives for TSPs to get involved in enum process (e.g., verify EU’s ownership of a TN and inform T1E about TN service disconnect)

Cons:

  • Only TSPs can be T2E, non-competitive if there is only one TSP in a serving market
  • Non-TSPs cannot be T2E
    • (except through delegation from TSP)
  • EUs cannot be T2E for their own TNs
  • EUs cannot get enum service if none of TSPs in the serving market offers enum service
telephony service specific records
Telephony Service Specific Records
  • Are there services for which the TSP should have right to put records in ENUM?
  • How can TSP control records in Tier 2 of end user choice?
  • How might these records be distinguished?
  • Alternative is to treat TSP like any other application service provider
  • Ability of TSP to populate ENUM for customer will facilitate penetration
major issues
Major Issues
  • Entity to be Service Registrar
  • Authentication of rights to number
    • Number assignment
    • User identity
  • Disconnect notification
    • Who informs Registry?
  • Telephony service specific records
references
References
  • Patrik Faltstrom, “E.164 Number and DNS” RFC 2916.
  • draft-pfautz-na-enum-01.txt
  • draft-pfautz-yu-enum-adm-00.txt
  • draft-ranalli-peek-walter-enum-t1roles-00.txt