SI-501 Mini-Talk, Ann Arbor, MI February 9 th, 2005 Internet2's Voice and Integrated Communications Initiatives SI-501 Mini-Talk Ann Arbor, MI February.

SI-501 Mini-Talk, Ann Arbor, MI February 9th, 2005

Internet2's Voice and Integrated Communications Initiatives

SI-501 Mini-TalkAnn Arbor, MI

February 9th, 2005

Ben Teitelbaum <[email protected]>http://people.internet2.edu/~ben/


Voice● Not just a crusty relic● Voice is the dominant real-time

communications medium among homo sapiens– Text is the dominant non-real time meduim– A big chunk of the human brain is dedicated to

processing visual input, but that's for other stuff (e.g. avoiding cliffs/trees, identifying faces, stalking prey)

● Per-capita use/expenditure continues to rise● A “killer app" for the last ~100 years and for

foreseeable future


VoIP● Not just a cost-saving hack ● Open industry standards and the Internet are

revolutionizing telecom– New industry structures– New architectures, services, and applications– No longer a binary choice between PBX and

Centrex● Trends

– Decentralized control– À la carte system components and services– Greater empowerment of campuses and

enterprises– Greater empowerment of end users


● Many, many ways to do better...– Fidelity– Privacy– Addressing– Mobility

Post-POTS Voice

– Survivability– Integration with IM, video,

etc.– Presence– I911

* Drawings by Louis Teitelbaum (age 6)


Dude, Where're My Customers?● Voice was once revenue-generating; no

longer● Users have adopted consumer services to

meet personal / profession needs– Cellular– Consumer IM&P (e.g. AIM, YIM, MSN)– Consumer VoIP (e.g. Skype, FWD)

● How can universities develop services to:– Recapture these customers?– Enhance the campus life experience?– Facilitate collaborative research?– Improve productivity?


Internet2

ITSP

...

Internet2 Infrastructure (campus, gigaPoP, RON, Abilene)

PBX / TDM Voice Switch

Internet Telephony Service Provider (ITSP)

Campus

SIP Proxy + Phones

IP – TDM Voice Gateway

*.edu

Key (for upcoming pretty pictures)1/2


TDM Voice Traffic

Packet Voice Traffic

PRI / CAS Voice Trunks

Key (for upcoming pretty pictures)2/2

Signaling


Internet2

Campus VoIP Today

b.edua.edu

... ...

LEC/IXC LEC/IXC

PSTN


Internet2

Campus VoIP Today

b.edua.edu

... ...

ITSPLEC/IXC LEC/IXC

PSTN


Internet2

Campus VoIP Today

b.edua.edu

... ...

ITSPLEC/IXC LEC/IXC

PSTN


Internet2

Campus VoIP 2020*

b.edu

...

a.edu

...

* Don't hold me to this!


Internet2

Campus VoIP 2020

FeatureServer

LDAP

DirectoryServices

PresenceServer

FeatureServer

LDAP

DirectoryServices

PresenceServer

b.edu

...

a.edu

...


Internet2

Campus VoIP 2020

FeatureServer

LDAP

DirectoryServices

PresenceServer

FeatureServer

LDAP

DirectoryServices

PresenceServer

ASPFeatureServer

b.edu

...

a.edu

...


Internet2

Campus VoIP 2020

FeatureServer

LDAP

DirectoryServices

PresenceServer

FeatureServer

LDAP

DirectoryServices

PresenceServer

ASPFeatureServer

ITSP

b.edu

...

a.edu

...

PSTN


Internet2

Campus VoIP 2020

FeatureServer

LDAP

DirectoryServices

PresenceServer

FeatureServer

LDAP

DirectoryServices

PresenceServer

ASPFeatureServer

ITSPITSP

b.edu

...

a.edu

...

PSTN


Internet2

Campus VoIP 2020

FeatureServer

LDAP

DirectoryServices

PresenceServer

FeatureServer

LDAP

DirectoryServices

PresenceServer

ASPFeatureServer

ITSPITSP

c.com

...Internet

b.edu

...

a.edu

...

PSTN


How to Get There From Here?● Difficult environment to innovate

– Tight budgets– Carrism (i.e. IT is not strategic)– Fear, uncertainty, and doubt over industry

directions, regulatory environment, etc.● In the long-run, there will be little role

for centralize service providers● Need to develop new campus

communications service models and core connective middleware infrastructure


Connective Middleware

high-performance, end-to-end IP transit

BobAlice

UserCampusUser Internet2/GigaPoP/ASPCampusHost Host

Network-LayerConnectivity

Applications

APIsCodecs

APIsCodecs

Signaling Signaling

Connective Middleware

Call FilteringAuth N/Z

Call FilteringAuth N/Z

IdentityPresence

Call Routing

IdentityPresence

Call Routing

Damping Middleware

Rich PresenceServices Calendaring

Location

... ...Calendaring

Location

Dire

ctor

ies D

irectories

Sig

nalin

g SignalingCampus-to-Campus

Trust / Policy / Encryption

P2P mediaand

Trust / Policy / Encryption

...or... ...or...AuxiliaryServices Gatewaying

Bridging

Messaging...

GatewayingBridging

Messaging...

GatewayingBridging

Messaging...


SIP.edu Working Group● Web Site

– http://voip.internet2.edu/SIP.edu/● Chair

– Dennis Baron, MIT{email, sip}: [email protected]


SIPProxyDNS

SIP-PBXGateway PBX

INVITE(sip:[email protected])

INVITE(sip:[email protected])

DNS SRV query sip.udp.bigu.edu

telephoneNumberwhere mail=”bob”

PRI / CAS

bigu.edu

CampusDirectory Bob's Phone

sip.udp.bigu.edu IN SRV ...

SIP.edu Architecture (today)

IP Voice

TDM Voice

SIP User Agent


DNS

INVITE (sip:[email protected])DNS SRV query

sip.udp.bigu.edu

bigu.edu

SIP User Agent

locationDB

If Bob has registered, ring his SIP UAs; Else, call his extension through the PBX.

REGISTER(Contact: 207.75.164.131)

INVITE (sip:[email protected])

SIPProxy

Bob's SIP Phones

SIP.edu Architecture (real soon)

SIPRegistrar

IP Voice, Video, IM, ...


SIP.edu Growth


Presence and Integrated Communications ● Working Group Web Site

– http://pic.internet2.edu/● Chair

– Jeremy George, Yale{email, sip}: [email protected]


Presence● 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


Rich Presence Trials● Using Internet2 meetings to prototype

advanced campus services – Advanced WiFi infrastructure (location service)– Advanced middleware infrastructure

(SIP/SIMPLE presence agent / location server)– Advanced real time communications services

● Highly-participatory– Enthusiastic attendees – Distributed trial-dev team

● Columbia IRT Lab, HP Labs Cambridge, University of Pennsylvania, Ford Motor Company, Microsoft, ...


Rich Presence Enabled Clients

• WaveThree and Columbia clients (Session, SIPC)• Others welcome! (client requirements doc on web)


NG911 Project● Internet 911

– 911 has been a thorn in the side of VoIP– Technically, not a hard problem

● NG911– NTIA-funded project to IP-enable PSAPs

● Not only solve VoIP 911, but do better!– Higher resilience– Faster call setup– Testability

● Based on IETF GEOPRIV work

• Multimedia support• Open standards and COTS• Cheaper


Emerging IETF/NENA I3 Architecture

GPS

40.86N 73.98ECN=us A1=NJ A2=Bergen

INVITE sips:sos@

DHCP

outboundproxy server

provided by local ISP? 40.86N 73.98E: Leonia, NJ fire dept.

leonia.nj.us.sos.arpaPOLY 40.85 73.97 40.86 73.99NAPTR … [email protected]

* This slide complements of Henning Schulzrinne, Xiaotao Wu, & the CINEMA crew (Columbia University)

Location-based call routing: UA knows its location


Conclusion● Voice must be seen as stragetic● VoIP will be much more than POTS

replacement● Several Internet2 initiatives are helping

campuses develop the infrastructure and technology for next-generation campus communications services


FIN

SI-501 Mini-Talk, Ann Arbor, MI February 9 th, 2005 Internet2's Voice and Integrated Communications Initiatives SI-501 Mini-Talk Ann Arbor, MI February.

Documents

ann arbor

ben slide

ben teitelbaum

internet2s voice