Copyright © 2003 Avaya Inc. All rights reserved

The Promise of SIPInter-personal communications

April 20, 2004

Bruce Mazza

bmazza@avaya.com

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• Today’s demands• Technology is a differentiator in attracting top talent to campuses

• Geographically dispersed teams “virtual teaming”

• Increasingly mobile students, researchers, professors and administrators

• Faster response to research colleagues and access to experts

• More and more collaboration

• Reliable and resilient Communications

• Time is finite. • “Your time” = Research Time = Grant deadlines, quality of research

• Are users equipped for this world?• Multiple phones, devices, mailboxes…

• Different access methods at different times

• Phone tag, email tag, insecure “Internet” instant messaging, unintegrated wireless

• What if it all worked together!

• Today’s demands• Technology is a differentiator in attracting top talent to campuses

• Geographically dispersed teams “virtual teaming”

• Increasingly mobile students, researchers, professors and administrators

• Faster response to research colleagues and access to experts

• More and more collaboration

• Reliable and resilient Communications

• Time is finite. • “Your time” = Research Time = Grant deadlines, quality of research

• Are users equipped for this world?• Multiple phones, devices, mailboxes…

• Different access methods at different times

• Phone tag, email tag, insecure “Internet” instant messaging, unintegrated wireless

• What if it all worked together!

Challenge – The User Has Been ForgottenNeed for a user-centric communications architecture

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Agenda

• About Avaya

• SIP Summary

• Enabling User-Centric Communication

• Use Cases

• Backup Slides

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About Avaya

• Leading global provider of communications solutions and services that help businesses, government agencies and other institutions excel.

• #2 Worldwide in Communication Systems• #1 Worldwide in unified messaging, messaging systems,

call centers and structured cabling systems. • Spun from Lucent Technologies in 2000• Avaya Labs Research team, roots in Bell Labs• Current customers include 30% of Internet2 Member

Universities, and 90% of the Fortune 500.• Avaya Recognized as First "Fortune 500 Citizen of the

Disability World"

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Avaya and Internet2

• Avaya recently joined Internet2

• Engaging in collaborative efforts with the VoIP Working Group and Presence and Integrated Comunications (PIC):

– SIP.edu

– VoIP SIP Interoperability Study

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Agenda

• About Avaya

• SIP Summary

• Enabling User-Centric Communication

• Use Cases

• Backup Slides

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Avaya view SIP

• Session Initiation Protocol– IETF standard for communications convergence– Based on RFC 3261 and associated documents

• Media agnostic• Voice, video, instant messaging, TTY, etc.

• A message based protocol– Derivative of HTTP– Stateless

• Compare with circuit switched communications• Views communication and collaboration in the context

of a “Communication Session” between humans, not specific devices

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AttributesMedia Agnostic Routing Protocol

• SIP a text-encoded protocol based on elements of HTTP and SMTP. Designed for peer-to-peer communications, and uses a client-server (request/reply) model similar to HTTP.

• Designed to set-up, modify, and tear down communication sessions. 

• SIP can support any type of communication session; it is agnostic to the content whether it is voice, video, or instant messaging.

• Stateless. Messages carry their own routing information

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AttributesLogical User Addressing• SIP provides a logical identity (Uniform Resource Indications) URI

– E.g. “sip:gwbush@whitehouse.gov” or “sip:408-555-1212@whitehouse.gov”

• Identity is mapped to arbitrary devices (Uniform Resource Locator) URL. User=phone, user=e-mail, etc

• Independent of physical location. Hoteling and User Mobility are native

Desktop Application (e.g. softphone) SIP

Phone

Mobile PhoneInstant Messaging Client Desk phone

Hand held IP Device

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AttributesPresence and Instant Messaging

• SIP for Instant Messaging and Presence Leveraging Extensions (SIMPLE)

• Introduces “Presence” into communications state– Based on Subscribe and Notify Events– The Body of a Notify message can be something like XML

information.

• RFC has not yet agreed on standard for presence. – SIMPLE is being used by IBM, Microsoft, Avaya, etc and is

evolving into the standard for the Enterprise market– XMPP (Jabber.org) is used by AOL, etc and is evolving into

the standard for the Consumer market– Gateways will need to exist

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AttributesSecurity• SIP Space Threats are multi-faceted. Voice, IM, Video,etc

– Identity Spoofing, Toll Fraud, DoS, Viruses, SPAM, SPIM, etc• SIP Security Profile (RFC 3162)

– Signaling channel: Transport Layer Security (TLS) hop-by-hop, identity transitive trust

– Bearer channel: SRTP is the new voice security standard offering. SIP extension allows the key exchange in order to construct the security keys.

– Multimedia security. S/MIME end-end protection (confidentiality, authentication of content) for IM, email.

• Complementary attributes

– Authorization & Policy• Authentication verifies who you are• Authorization specifies what you can do.

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ComponentsUser Agents & Servers in a SIP Network

Avaya CCS Edge Server

A@

B@

C@

A@

B@

C@

A@

B@

C@

SIP over TLS

SIPIM over

TLS

SIP Service Providers

External Domains

SIP

DCP/AnalogH.323

Telephony

SIP over TLS

4602 SIP Phone

3rd Party SIP Phone

A@

B@

C@

A@

B@

C@

A@

B@

C@

SIP over TLS

SIPSIP

H.323

IP Softphone R5(Integrated IM)

SIP over TLS

Avaya Communication

Manager

EnterpriseLAN

Avaya CCS Home Server

Avaya CCS Home Server

A@

B@

C@

A@

B@

C@

SIP UserAgent

B2B UserAgent

SIP RedirectServer

SIP ProxyServer

SIPGateway

SIPPresence

SIPRegistrar/Location

Legend

Database

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Avaya Converged Communications Server Evolutionary path, integrating old and new, Avaya and 3rd party

PSTNPSTN

sip:customer.com

sip:nj.customer.comsip:uk.customer.cometc.

“Edge” Domain Server

Domain Servers

SIP DomainsInternet, Intranet, Extranet

Service Providers

SIP DomainsInternet, Intranet, Extranet

Service Providers

Converged Communications

Server

Converged Communications

ServerCommunication

Manager 2.0Communication

Manager 2.0

SEAMLESS

Communications

IP Softphone SIP/SIMPLE Instant Messaging

IP, Wireless, Digitaland Analog Endpoints

SIP Endpoints

Multi-Vendor SIP Clients & Applications

CM Features

3rd Party SIP Endpoints

3rd Party SIP Applications

“feature server”B2BUA

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Agenda

• About Avaya

• SIP Summary

• Enabling User-Centric Communication

• Use Cases

• Backup Slides

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User-centric Communications ArchitectureExpanding integration with secure SIP-based services

• Architecture focus shifts to user– Users not devices, enabling user mobility – User identity, presence, rules, routing

• Unified Access– Enhanced softphones, phones, PDA apps– Increased endpoint intelligence– Integrate with speech, web, wireless

• Application integration– SIP is a key “glue” between business and

communications applications and endpoints.

– Along with XML and Web Services

• Communication Services– Secure SIP-based integration layer to be

leveraged across Avaya portfolio– Natural evolution from current products– Open standards-based APIs

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What roles does SIP play in enabling user centric communications?

• Increases scalability to reach more users• Business Continuity through distributed topology and

stateless communications• Glue between legacy and non-legacy devices, application

servers, networks.

• Rich Presence and Instant Messaging

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Scalability

• SIP is inherently scalable– Signaling only – no media

– Session stateless

• Almost eliminates resource consumption– 100 cps = 360,000 BHCA

• ~7 calls per hour from user base of 50,000

• Various techniques to address traffic spikes– E.g. load balancing, fail-over, etc.

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Network Topology & Scaling(Domain & Sub-Domain Authoritative Servers)

Sub-Domains

Domain company.comINVITE sip:joe@company.com

Edge proxy

Mapping Data

eng.company.com

User Data,Prefs….

Home proxy

INVITE sip:joe@sales.company.com

sales.company.com

Home proxy

User Data, Prefs….

mktg.company.com

Home proxy

User Data,Prefs….

2-5 Home Proxies

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Network Topology & Scaling(Domain & Sub-Domain Authoritative Servers)

Sub-Domains

Domain company.com

INVITE sip:joe@company.com

Edge proxy

Mapping Data

eng.company.com

User Data,Prefs….

Home proxy

mktg.company.com

Home proxy

sales.company.com

INVITE sip:joe@sales.company.com

Home proxy

User Data, Prefs….

User Data,Prefs….

2-5 Home Proxies

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Business Continuity / Survivability• Active / standby failover

• Shared virtual IP address:– Standby server monitors the liveness of the Active

server

– All state updates are replicated

Proxy / Presence

SIP

SIP phone

Softphone

Proxy / Presence

ReplicatedState

DNS

SIP phone

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Business Continuity / Survivability– Standby takes over IP address on detection of Active

failure

– “Original Active” becomes Standby on restart and synchronizes missed data updates

Proxy / Presence

SIP

SIP phone

Softphone

Proxy / Presence

ReplicatedState

DNS

SIP phone

X

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Convergence Glue

• SIP is the glue between legacy and non-legacy devices, application servers, networks.

• Promotes interoperability of applications, networks, vendors.

– SIP’s text-based structure greatly simplifies interoperability between different vendor implementations by making it easier to interpret messages.

• Supports mobility of devices• More intelligent endpoints and applications• Allows customers to evolve rather than forklift

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B2BUA

• SIP Proxy gets requests to or from users. Can’t do mid-call processing

• However, the proxy can hand requests to feature servers (B2BUA) for additional processing,

• Crucial to provide end-to-end tracking of the call state, mid-session manipulation and control (I.e. media transcoding),

• Mechanism for integration with advanced and legacy applications.

– Advanced telephony

– Call Center, etc.

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Evolutionary Strategy provides Investment Protection

SIP-enabled Avaya™ Communication Manager

B2BUA

IP phones

SIP Origination / Termination Network

PSTN & MobileNetworks

TDM phones IP Softphone R5

Avaya™ Converged Communications

Server

SIP

SIP

SIP to SIP routing

SIP

4602 SIP Phone

SIP

SIP

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SIP Telephony Feature Support (SIPPING 16)

• Call hold

• Music on hold

• Attended / unattended transfer

• Call forwarding – unconditional / busy / no answer

• 3-way conference

• Find me

• Call forward

• Call waiting

• Automatic redial

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Additional Telephony Features via B2BUA with Avaya Communication Manager

• Active appearance select• Automatic call back• Automatic call back cancel• Call forwarding all• Call forwarding busy/no answer• Call forwarding deactivation• Call park• Call park answer back• Call pick-up• Conference on answer• Calling party number block• Calling party number unblock• Directed call pick-up

• Drop Last Added Party• Exclusion (Toggle on/off)• Held appearance select• Idle appearance select• Last number dialed• Malicious call trace activation• Malicious call trace deactivation• Manual signaling• Priority call• Send all calls enable • Send all calls disable• Transfer on hang up• Transfer to voice mail• Many more…

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• Researchers and Educators depends on knowledge in distributed reservoirs of information

• Dependencies on geographically dispersed research teams and distance learning

• High levels of collaboration are needed

• Continuous cost reduction

• Develop home grown applications to fulfill specific needs

Drivers for Presence and IM in Education

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• Available to talk now• Available via IM only• Traveling • Working off-site• Not available

An End to Phone Tag• ‘Communication Sessions’ are based on “Presence” This helps

dictate how you might want to communicate with that person.

• I.e. the publication of your willingness and ability to communicate

– Note that Presence publication is selective

Voicemail

Softphone

IM Client

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Avaya IPSoftphone

SIP/SIMPLE Presence & Instant Messaging

ENTERPRISE BUDDY LIST

SIP-enabled Avaya Communication Manager

On-hook / Off-hook

Desk phones

Avaya Converged Communications Server

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Softphone

Features Leveraged with Presence

• “Click-to-conference”

Communication Manager

IP phone TDM phone

CCS Home Proxy(incl. Presence & Registrar)

User at the airport on a softphone

SP SIP Network

SIP

Media

SIP phones

“I want to have a conference with 4 other people who are giving ‘Available’ Presence indications”

SIP Conference Server

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Avaya Vision of Presence • Presence Server.

– Subscribe to a network based buddy list. – Collects information from applications about presence state of

devices that it manages. • Vision – Network-based Presence

– Your phone has a presence state– Your Desktop calendar has a presence state– Your Wireless LAN card has a presence state– IM client– Cell Phone– Hard phone

• Aggregate a Users total presence state from a plethora of different devices• Implement User Policy in the network. Control the availability of presence

information.

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Avaya Vision of Presence

• Example: Define new boundaries of Presence– Old World – “Busy” used to mean that a particular phone

was off hook.

– New World – Busy may mean that a user is off-hook on a telephone, typing an e-mail, in a meeting, or whatever else that User’s policy is setup to describe as busy.

• Use presence to affect call flow – Old World – Call Forward on Busy/No Answer

– New World – Call Forward on Busy/No Answer will have a whole new meaning.

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Personal Profile Manager

• Concept is to manage and store personal directory information – Accessible from any client or endpoint– Available to applications requiring directory access

• Permissions Management– Manage access to communications state

• Selective presentation of presence and availability

Converged Communications Server (includes Personal Profile Manager)

Directory leveraged by all SIP-enabled devices and applicationsSIP

Manage Personal Directory and Permissions Management preferences

SIP Presence NOTIFY

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Integration with Desktop Tools

• Microsoft & Lotus competences:– Desktop Collaboration, email, calendaring, to-do lists, contact

lists etc.

• Avaya’s competences:– Telephony and voice messaging are key convergence features

• Especially multi-party conferencing

• Points of Integration:– Combining application state and communication state

– Integrating calendar data into routing decisions via presence

– Instant Messaging

– UM currently integrated with email from both vendors

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Agenda

• About Avaya

• SIP Summary

• Enabling User-Centric Communication

• Use Scenarios

• Backup Slides

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Concept: Auto Conferencing based on Availability

Communication Manager

IP phone TDM phone

Converged Communication Sever Home Proxy

(incl. Presence & Registrar)

Researcher at University 1 Abilene

SIP

Media

Researcher at University 2

“I want to automatically launch a conference today with 4 specific researchers as soon as they all give ‘Available’ Presence indications”

SIP Conference Server

Researchers at University 3

Researcher in Field on 802.11

wireless device

Presence Server Automatically detects desire presence state

Conferences all parties together. and

Voice Call is recorded

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Concept: Hospital Presence and Notify

2. Physician enters his notification and

presence preferences into self-service portal

4. Lab tech enters test results into patient records

management system

MedicalInformationSystem

Avaya CCS

5a. Records management system

sends event to Notification App

5b. Or, alternatively, App polls records management system

for updates

1. System Administrator sets up

notification rules in Notification Application

3. Patient undergoes a

series of medical tests

6. Based on the Physician’s calendar, he is Not Available …a little too busy!

7. Presence server status allows call routing to on-call

physician and reserves resources

on a Pre-surgery Video Conference.

8. On-call physician accesses test results

and immediately is put into a video and IM

conference with Available experts from

around the nation.9. Notify App system

maintains a record of the notification and response and

conference. All encrypted

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Concept: Converged Seamless Mobility Architecture

Wireless LAN Infrastructure

Motorola Dual 802.11/Cellular Handset

PWN

Outside the Campus Within the Campus

Communication Manager-enabled

IP-PBX and SIP Presence Server

Mobility Manager

Jane is taking a call on campus on her 802.11 wireless device, but drives to the city for dinner plans.

Thanks to Presence Information, as Jane walks out to the parking lot, her call is automatically handed to the Public Wireless Network

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Communications Convergence VisionS

ystem M

anag

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t

SIP Infrastructure

SIP Clients & Endpoints(including Avaya & 3rd Party)

3rd P

arty Ap

plicatio

ns

and

Web

Services

Un

ified C

om

mu

nicatio

ns

Ap

plicatio

ns

Fu

ture A

vayaA

pp

lication

s

Perso

nal W

orksp

ace M

anag

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Co

ntact C

enter

Ap

plicatio

ns

Co

mm

un

ication

Man

ager

(Telep

ho

ny F

eature

Server)

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Agenda

• About Avaya

• SIP Summary

• Enabling User-Centric Communication

• Use Scenarios

• Backup Slides

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Avaya view on SIP Interoperability

• Avaya is an active participant in IETF standards for SIPPING and SIMPLE– Reserve the right to implement IETF draft standards as required

– Will respond to market requirements to support certain SIP “extensions”

• Leveraging a commercial SIP framework as basis for development

• Avaya participates in SIPit (bi-annual SIP interop convention)– Capabilities tested:

• Basic calls; Presence; IM

– Vendors tested with:

• Alcatel, AT&T, AudioCodes, AudioTest, Broadcom, Cisco, Compaq, Digaco, dynamicsoft, HCL, Hughes, Indigo, Mediatrix, Mitel, NIST, Nokia, Nuera, Pingtel, Polycom, Radcom, Radvision, Siemens, SNOM, Sylantro, Telogy, TonesTest, Trillium, Vovida, Webley, Wipro, Worldcom

• Will be leveraging standard test tools in development (e.g. Navtel)

• Planning to pursue independent certification (e.g. MierComm)

• Will certify interoperability with selected partners (e.g. Level(3))

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• Latest generation IP Softphone supporting Avaya Communication Manager 2.0

• Incorporates a SIP IM client and a presence-based contact (“Buddy”) list

– Contact directory includes both phone numbers and IM user IDs

– Tracks contact list presence information (peer to peer in Release 2.0)

– IM-to-Voice and Voice-to-IM at a touch of a button

• Expands Productive Dial & Call Receipt Capabilities

– Better integration with Microsoft® Outlook® - enabling dialing from contact lists and screen pops that offer contact information when calls from contact list members are answered

– LDAP Directory dialing– Click and Dial from Web browsers

IP Softphone R5Integrated Voice & Instant Messaging

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Avaya IP Softphone 5.0Integrating voice & instant messaging

• Adds presence, instant messaging – Contact directory with phone numbers

and IM “buddy list” IDs– Combined phone and IM presence shown– Includes call and IM logging capability– IM-to-voice, voice-to-IM at touch of a button– Delivered by Converged Communications

Server

• Full-function rich telephony– Delivered by Communication Manager 2.0

• Evolutionary– Easy to add to traditional and IP telephony– Same softphone customers already deploying

• Standards-based – SIP, SIMPLE– (Roadmap: Integration with consumer IM)

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Avaya IP Softphone 5.0Enhancing user productivity

• Softphone useable in many ways– PC with headset or USB phone device– Softphone controls IP phone– Softphone controls existing digital phone– Voice bridged out to home or wireless phone– (Softphone for Pocket PC PDA)

• Desktop integration – Click and dial from Web browser highlights– Dial from Microsoft Outlook contacts– Dial from other desktop apps through TAPI– Contact screen-pops on incoming call– Call log integration into Outlook journal– LDAP enterprise directory dialing

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• Exceptional value– Entry level multi-line SIP-base IP phone

– Access to Communication Manager 2.0 features(extending “SIPPING 16”)

– Can be used in conjunction with IP Softphone

– List Price of $195

• Increasing choice in endpoints– Starting with market demand for lower costs– Open SIP standards enable multivendor interoperability– Actively testing third-party SIP phones and encouraging vendors to join

DevConnect program to test interoperability with Avaya applications

Avaya 4602 SIP PhoneCost effective standards-based SIP phone

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Summary

• Converged Communications is about integrating communication context with application context

• Avaya is developing a converged communications application suite

– SIP enabled communication infrastructure– Enterprise presence infrastructure– Integrated with applications– Operate in a multi-vendor SIP environment– Deliver value add end-to-end SIP solutions

• Internet2 offers Avaya an opportunity to collaborate with thought leaders on leading edge technology for Higher Education and beyond

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Official Convergence Communication Providerfor the 2002 and 2006 FIFA World Cup™

FIFA Women’s World Cup USA 2003

© 2004 Avaya Inc. All Rights Reserved. 

All trademarks identified by the ® or TM are registered trademarks or trademarks, respectively, of Avaya Inc. All other trademarks are the

property of their respective owners.