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

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)

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… 2

How to SIP from 12-key phones? Old World IP Desk Phones Legacy Desk Phones Cell Phones Emerging PSTN New World 3

Head Scratching in SIP.edu WG  IVR Gateway  Hash Registrar  Domain Redirect  ISN • Improvement on Domain Redirect • Inspired by INOC-DBA 4

ITAD Subscriber Numbers (ISN)  4257*260 locally Internet Telephony assigned Administrative Domain (ITAD)  ITADs • Defined by Telephony Routing over IP (TRIP) [RFC3219] • Globally unique • Lots of them (256 through 2 32 -1) • IANA is already set up to allocate  ISN resolution works just like ENUM 5

ENUM in a Nutshell  Take an E.164 number +1-734-913-4257  Convert it to FQDN 7.5.2.4.3.1.9.4.3.7.1.e164.arpa.  Query DNS for NAPTRs e164.arpa. 1.e164.arpa.  Apply resulting regexs to get list of URIs: 4.3.7.1e164.arpa. x.x.x.1.e164.arpa. sip:bdr@internet2.edu mailto:bdr@internet2.edu sip:bobr_621@att.sbc.com 6

ISN in a Nutshell 4257*260  Take an ISN 7.5.2.4.260.freenum.org.  Convert it to FQDN  Query DNS for NAPTRs freenum.org. 260.freenum.org.  Apply resulting regexs to get list of URIs: Note : We are working to ensure that the ISN root zone will be administered on behalf of the ISN user sip:bdr@internet2.edu community by a neutral, non-profit organization. mailto:bdr@internet2.edu Following the trial, the sip:bobr_621@att.sbc.com root may or may not be “freenum.org”. 7

ISN Status  Trial just starting • Supported by Internet2, Packet Clearing House, MIT, Tello  ISN Cookbook Published • Recipes for SER and Asterisk  Registered ITADs • Today • Coming Soon – Internet2 (260) – Stanford (274) – FreeWorld Dialup (262) – U Alaska (277) – Hofstra University (264) – UC Berkeley (278) – Florida State U (280) – UCLA (269) (accepting) – U Manitoba (281) – MIT (270) (accepting) – U Oregon (283) – State of Oregon (276) – +22 others 8

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 9

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 10

Thanks! 11