1. ISN Numbers Fast, Free, and Forever Yours Ben Teitelbaum, Internet2 John Todd, Tello Dennis Baron, MIT

2. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 2 Old World / New World +1-734-352-7031ben@internet2.edu Deep bureaucratic hierarchyThe world is flat (almost) Telco provider controlBe your own provider Radically new devices / services

3. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 3 SIP.edu SIP Proxy SIP-PBX Gateway PBX INVITE (sip:bob@bigu.edu) INVITE (sip:12345@gw.bigu.edu) DNS SRV query sip.udp.bigu.edu telephoneNumber where mail=bob PRI / CAS bigu.edu Campus Directory Bob's Phone DNS SRV SIP User Agent Basic Idea Grow SIP reachability at existing email addresses Leverage existing directories and PBXs

4. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 4 Campus Deployments

5. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 5 How to SIP from a 12-key phone? Cell Phones IP Desk Phones Legacy Desk Phones PSTN Old World* Emerging New World Solution: numeric aliases * Transitional period during which we have to support these devices will last a long time!

6. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 6 4257*260 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 locally assigned Internet Telephony Administrative Domain (ITAD) ITAD Subscriber Numbers (ISN)

7. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 7 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.

8. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 8 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 on behalf of the ISN user community by a neutral, non-profit organization. Following the trial, the root may or may not be freenum.org.

9. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 9 Trial just starting up Supported by Internet2, Packet Clearing House, MIT, Tello ISN Cookbook Published Recipes for SER and Asterisk 73 ITADs assigned so far ISN Status

10. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 10 Assigned ITADs (as of 3/15/06) Academic Internet2 Hofstra University UCLA MIT Stanford University of Alaska Fairbanks University of California, Berkeley Florida State University University of Manitoba (Canada) University of Oregon Royal Institute of Technology (Sweden) NE Worcestershire College (England) Trent University (Canada) University of North Carolina University of Texas, Austin Columbia University UCSD Taiwan Academic Network Corporate Enterprises Sterling National Bank Apple Computer VoIP Service Providers Free World Dialup Stealth Communications SIPcall.com RCN Corporation VoIPteq SIP Broker Other BizFu (web hosting) Manitoba New Democratic Party Packet Clearing House +36 others VoIP Solution Providers Tello Iotum Digium Government State of Oregon

11. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 11 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

12. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 12 ISN vs ENUM vs SIP AOR ISNENUMSIP AOR Example7031*260+1-734-352-7031ben@internet2.edu FamiliarityHuh?Phone numbersEmail address Delegating Authority IANAITU, national government, … ICANN, TLD registrars Address Structure local*domainHierarchical / geographical local@domain PortabilityWith domain owners cooperation Varies by country ??? With domain owners cooperation FragmentationOne spacePuclic ENUM + multiple private ENUMs One space

13. ISN Numbers: Fast, Free, and Forever Yours March 16, 2006 Spring VON, San Jose, CA 13 For More Information ISN Cookbook, FAQ, and other info http://freenum.org/ Further Questions? Ben Teitelbaum –ben@internet2.edu | 7031*260ben@internet2.edu John Todd –jtodd@tello.com | 2405*259jtodd@tello.com Dennis Baron –dbaron@mit.edu | 21232*270dbaron@mit.edu