ISN in a Nutshell 21st APAN Meeting Tokyo, Japan January 25, 2006 - - PowerPoint PPT Presentation

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ISN in a Nutshell 21st APAN Meeting Tokyo, Japan January 25, 2006 - - PowerPoint PPT Presentation

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ISN in a Nutshell 21st APAN Meeting Tokyo, Japan January 25, 2006 Ben Teitelbaum http://people.internet2.edu/~ben/ Bens avatar (talk given remotely, voice-only) What if SIP.edu Succeeded? SIP.edus Big Goals Better than POTS

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ISN in a Nutshell

21st APAN Meeting Tokyo, Japan January 25, 2006 Ben Teitelbaum http://people.internet2.edu/~ben/ Ben’s avatar (talk given remotely, voice-only)

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What if SIP.edu Succeeded?

  • SIP.edu’s Big Goals
  • Better than POTS
  • Campus-enabled
  • Converged address
  • But, users won’t adopt advanced

communications if the rest of the world can’t call them

  • The problem is not:

“How to preserve E.164?” rather, the problem is…

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How to SIP from 12-key phones?

Cell Phones IP Desk Phones Legacy Desk Phones PSTN

Old World Emerging New World

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Head Scratching in SIP.edu WG

  • IVR Gateway
  • Hash Registrar
  • Domain Redirect
  • ISN
  • Improvement on Domain Redirect
  • Inspired by INOC-DBA
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  • 4257*260
  • ITADs
  • Defined by Telephony Routing over IP (TRIP)

[RFC3219]

  • Globally unique
  • Lots of them (256 through 232-1)
  • IANA is already set up to allocate
  • ISN resolution works just like ENUM

locally assigned Internet Telephony Administrative Domain (ITAD)

ITAD Subscriber Numbers (ISN)

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  • Take an E.164 number
  • Convert it to FQDN
  • Query DNS for NAPTRs
  • Apply resulting regexs

to get list of URIs:

ENUM in a Nutshell

+1-734-913-4257 7.5.2.4.3.1.9.4.3.7.1.e164.arpa.

sip:bdr@internet2.edu mailto:bdr@internet2.edu sip:bobr_621@att.sbc.com

e164.arpa. 1.e164.arpa. 4.3.7.1e164.arpa. x.x.x.1.e164.arpa.

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  • Take an ISN
  • Convert it to FQDN
  • Query DNS for NAPTRs
  • Apply resulting regexs

to get list of URIs:

ISN in a Nutshell

4257*260 7.5.2.4.260.freenum.org.

freenum.org. 260.freenum.org.

sip:bdr@internet2.edu mailto:bdr@internet2.edu sip:bobr_621@att.sbc.com

Note: We are working to ensure that the ISN root zone will be administered

  • n behalf of the ISN user

community by a neutral, non-profit organization. Following the trial, the root may or may not be “freenum.org”.

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  • Trial just starting
  • Supported by Internet2, Packet Clearing House, MIT, Tello
  • ISN Cookbook Published
  • Recipes for SER and Asterisk
  • Registered ITADs
  • Today

– Internet2 (260) – FreeWorld Dialup (262) – Hofstra University (264) – UCLA (269) (accepting) – MIT (270) (accepting) – State of Oregon (276)

ISN Status

  • Coming Soon

– Stanford (274) – U Alaska (277) – UC Berkeley (278) – Florida State U (280) – U Manitoba (281) – U Oregon (283) – +22 others

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ISN in Four Easy Steps

  • 1. Request an ITAD from IANA
  • Simple piece of email
  • 2-week turnaround
  • 2. Publish your ITAD/ISN information in DNS
  • Option1: Put full NAPTR in root zone

*.xxx.freenum.org IN NAPTR 100 10 "u" "E2U+sip” "!^\\+*([^\\*]*)!sip:\\1@sip.big.edu!" .

  • Option2: Have root zone delegate to your own

nameservers

  • 3. Enable inbound ISN calling
  • 4. Enable outbound ISN calling
  • Option1: Native ISN lookup
  • Option2: Using Tello SIP redirector
  • Option3: Using Tello private ENUM
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More Information

  • ISN Cookbook
  • http://www.internet2.edu/sip.edu/isn/
  • Web Site
  • http://www.freenum.org/
  • Further Questions? Email us…
  • John Todd jtodd@tello.com
  • Ben Teitelbaum ben@internet2.edu
  • Dennis Baron dbaron@mit.edu
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Thanks!