Connectivity for Advanced VoIP and Integrated Communications National Internet2 Day March 18 th, 2004 Ben Teitelbaum, Internet2 For this and other talks...

Personal Communications Highest value applications are generic , telephone, postal mail Throughout the history of communications, generic person-to-person communications have dominated content distribution and domain-specific apps Voice The dominant real-time communications medium A "killer" network application for >100 years VoIP opens doors to make voice communications even more valuable

Long promised, but still inevitable Has happened in the core Happening now for residential / enterprise Drivers Cost, cost, cost, cost, cost Why have a giant switch, two networks, two staffs, etc.? Voice is just another network application Dampers QoS, 911, CALEA, USF, FUD Little user "pull" Voice / Data Convergence

Replace or Displace? If voice is so important, why be satisfied with replacing plain-old telephone service (POTS)?! Users are already defecting to cellular, SMS, AIM, MSN Messenger, Yahoo!, etc. VoIP can be much better than POTS Potential dimensions of improvement Fidelity Privacy Addressing Mobility Media translation Advanced Voice Survivability Integration with IM, video, etc. Presence "911++"

Replace or Displace? If voice is so important, why be satisfied with replacing plain-old telephone service (POTS)? Users are already defecting to cellular, SMS, AIM, MSN Messenger, Yahoo!, etc. VoIP can be much better than POTS Potential dimensions of improvement Fidelity Privacy Addressing Mobility` Media translation Advanced Voice Not covered here, but Internet2 projects in these areas exist Covered in this talk Survivability Integration with IM, video, etc. Presence "911++"

Connectivity "Paths in the snow" Don't predict how users will want to communicate Users are highly-motivated to communicate with each other and to innovate Connect them and watch what happens Witness: P2P file-sharing Network connectivity + middleware = P2P FS Similar potential for real-time apps We should get ahead of the curve this time and provide the enabling middleware ourselves

Network Connectivity (high-performance, end-to-end IP transit) Network connectivity: Can connections be established between communicating IP addresses with high-performance and high-availability? Application Connectivity (SIP/SIMPLE call and presence routing) Application connectivity: Are there protocols and call routing infrastructure to establish connections between communicating applications? User User connectivity: Can I reach you? Addressing Rich Presence Services Addressing Rich Presence Services Connective Middleware

Demographics ~3.8 million students (tech-savvy, talk a lot, adapt easily) And, by the way, they graduate (tech-transfer à la ) Institutional Commitments Internet2 members have committed to advance IP communications and promote collaborative apps Many are looking for ways to reverse eroding voice revenues Connectivity Great networking connectivity High-bandwidth, low-loss, low-jitter End-to-end transparency (few NATs) IPv6 and multicast too! Emerging middleware infrastructure for AuthN/Z Need to build on this to connect users with each other! Internet2's Secret Sauce

SIP.edu Whats SIP?

SIP Signalling protocol for creating, modifying, and terminating real-time internet media sessions SIP (and its extensions) support traditional telephony features as well as instant messaging and presence Attributes Provides: user registration, call routing, setup, tear down, and redirection Makes heavy use of existing standards Easy and familiar feel ( -style headers, HTTP- style error codes, URL addresses) Signaling and media paths separate SIP: Session Initiation Protocol (RFC 3261)

SIP Trapezoid Proxy Registrar Proxy Registrar Bob's softphone Alice's hardphone Media (and subsequent signaling) INVITE

Vigorous standards activity SIP (core protocol and extensions) SIPPING (applications) SIMPLE (instant messaging and presence) not just IETF, 3GPP too! Enthusiastic industry adoption Phones (Microsoft, Cisco, Pingtel, Snom,...) Servers (Cisco, Microsoft, Broadsoft,...) Conferencing (eDial, RADVision,...) Services (Level3, WorldCom, Vonage,...) Open source software Servers: SER (iptel.org) VOCAL (vovida.org) Soft Phones: Linphone KPhone SIP Happens

Fearless Leader Dennis Baron Goals Grow number of SIP connected users Increase value proposition for end-user SIP adoption Promote convergence of voice and identity Low entry-cost means for campuses to... Provide a useful service Start getting their feet wet with SIP Means SIP.edu cookbook available on web site Partnering with vendors (Cisco working with 6 schools) SIP.edu

Addressing Users should not be burdened with device addresses, when its people they really care about Addresses should be mnemonic and empower enterprises to manage the identities of their users Its time to put E.164 phone numbers behind us! A.G. Bell did not say , come here. I need you! Remember: It's People We Are Connecting

SIP Proxy DNS SIP-PBX Gateway PBX INVITE INVITE DNS SRV query sip.udp.bigu.edu telephoneNumber where mail=bob PRI / CAS bigu.edu Campus Directory SIP User Agent Bob's Phone sip. udp.bigu.edu IN SRV... SIP.edu Architecture (today)

DNS INVITE DNS SRV query sip.udp.bigu.edu bigu.edu SIP User Agent location DB If Bob has registered, ring his SIP UAs; Else, call his extension through the PBX. REGISTER (Contact: ) INVITE SIP Proxy SIP Registrar Bob's SIP Phones SIP.edu Architecture (real soon)

>8 other schools working on it SIP.edu Growth

Presence and Integrated Communications Presence Notification of events that facilitate communication (Henning Schulzrinne) On-line, Away, Idle, On phone, Out to lunch,... Back to the future? Remember: finger, write, who? Presence restores the sense of community that existed on timesharing systems Forward to the future! New standards for interoperability and scalability User-centric control of presence publication Richer state semantics and automatic triggers

Indianapolis October, 2003 Honolulu January, 2004 Arlington April, 2004 Rich Presence Trials

Client Mockup WaveThree Software and Columbia U. have provided clients (Session, SIPC) Others welcome! (client requirements doc on web)

Chairs Walt Magnussen Mike Enyeart Web site Projects SIP.edu Voice Disaster Recovery H.323 VoIP Testbed VoIP Working Group

Chair Jermey George Web site Projects Rich Presence Trials Social Context Study Group Presence and Integrated Communications Working Group