Internet2 Day at TAMU

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					ISN Numbers
Fast, Free, and Forever Yours

Ben Teitelbaum, Internet2
John Todd, Tello
Dennis Baron, MIT
              Old World / New World




                                                                           Radically new devices / services

 +1-734-352-7031                                                               ben@internet2.edu
Deep bureaucratic hierarchy                                                     The world is flat (almost)


   Telco provider control                                                            Be your own provider


       “ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA                  2
                               SIP.edu
SIP User Agent
                                                                    Basic Idea
                                                                        • Grow SIP reachability at existing email
                                                                          addresses
                                                                        • Leverage existing directories and PBXs
                                  INVITE
       DNS SRV query              (sip:bob@bigu.edu)
       sip.udp.bigu.edu

                                                                                                                          bigu.edu
                           SIP                       INVITE                          SIP-PBX            PRI / CAS
   DNS                                                                                                                PBX
    SRV
                          Proxy             (sip:12345@gw.bigu.edu)                  Gateway
                                  telephoneNumber
                                  where mail=”bob”


                         Campus
                         Directory                                                                                  Bob's Phone

                 “ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA                        3
              Campus Deployments




“ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA   4
                       How to SIP from a 12-key phone?
Old World*
                                                                                                   Emerging
                                                                                                   New World
                    IP Desk
                     Phones
                                          Legacy Desk
                                            Phones
   Cell Phones



                           PSTN
                                                                                       Solution:
* Transitional period during which we have to
support these devices will last a long time!
                                                                                       numeric aliases
            “ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA          5
       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 232-1)
         • IANA is already set up to allocate
ISN resolution works just like ENUM
“ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA   6
          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.



 Apply resulting regexs
                                                                                    1.e164.arpa.


  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

   “ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA                          7
          ISN in a Nutshell
 Take an ISN                                                                 4257*260

 Convert it to FQDN                                       7.5.2.4.260.freenum.org.

 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,
                        mailto:bdr@internet2.edu                                             non-profit organization.
                                                                                             Following the trial, the root
                        sip:bobr_621@att.sbc.com                                             may or may not be
                                                                                             “freenum.org”.
   “ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA                            8
          ISN Status
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 Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA   9
                  Assigned ITADs (as of 3/15/06)
Academic                   Corporate Enterprises
   •   Internet2
                                            • Sterling National Bank
   •   Hofstra University                                                 VoIP Service Providers
                                            • Apple Computer
   •   UCLA                                                                   • Free World Dialup
   •   MIT                                          Government                • Stealth Communications
   •   Stanford                                         • State of Oregon     • SIPcall.com
   •   University of Alaska Fairbanks                                         • RCN Corporation
   •   University of California, Berkeley
                                                                              • VoIPteq
   •   Florida State University
                                                                              • SIP Broker
   •   University of Manitoba (Canada)
   •   University of Oregon
   •   Royal Institute of Technology (Sweden)
                                                                             VoIP Solution Providers
   •   NE Worcestershire College (England)                                       • Tello
   •   Trent University (Canada)                                                 • Iotum
   •   University of North Carolina                     Other                    • Digium
   •   University of Texas, Austin                           • BizFu (web hosting)
   •   Columbia University
                                                             • Manitoba New Democratic Party
   •   UCSD
                                                             • Packet Clearing House
   •   Taiwan Academic Network Yours” March 16, 2006 Spring VON, San Jose, CA
              “ISN Numbers: Fast, Free, and Forever                                                 10
                                                             • +36 others
        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
 “ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA   11
                ISN vs ENUM vs SIP AOR
                    ISN                                       ENUM                              SIP AOR
Example             7031*260                                  +1-734-352-7031                   ben@internet2.edu
Familiarity         Huh?                                      Phone numbers                     Email address
Delegating          IANA                                      ITU, national                     ICANN, TLD
Authority                                                     government, …                     registrars

Address             local*domain                              Hierarchical /                    local@domain
Structure                                                     geographical

Portability         With domain owner’s Varies by country                                       With domain owner’s
                    cooperation         ???                                                     cooperation

Fragmentation One space                                       Puclic ENUM +                     One space
                                                              multiple private
                                                              ENUMs



         “ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA                  12
       For More Information

ISN Cookbook, FAQ, and other info
         • http://freenum.org/
Further Questions?
         • Ben Teitelbaum
                 – ben@internet2.edu | 7031*260
         • John Todd
                 – jtodd@tello.com | 2405*259
         • Dennis Baron
                 – dbaron@mit.edu | 21232*270



“ISN Numbers: Fast, Free, and Forever Yours” March 16, 2006 Spring VON, San Jose, CA   13

				
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