SIP-Based Enterprise Communications Platforms

October 4-7, 2004 • Los Angeles, CA • www.itexpo.com

SIP-Based Enterprise Communications Platforms

Pat RudolphVice President, Solutions Architecture

3Com Corporation


Is SIP Over-Hyped?• Remember ISDN promises in 1990?

• Remember ATM in LAN infrastructure?

• Remember VoDSL (GR-303 back-haul)?


Voice Market OverviewAnnual Systems Sold by Size

0

20,000

40,000

60,000

80,000

100,000

120,000

2-10

11-20

21-40

41-100

101-400

401-1000

1001-4000

-4000+

# of Users

# of S

yste

ms

$-

$500,000,000

$1,000,000,000

$1,500,000,000

$2,000,000,000

CY00 CY01 CY02 CY03 CY04 CY05 CY06

Year

Small

Medium

Large

LAN Telephony Market North America

Growing market in all segments – One size does NOT fit all

Three primary segments:

• Small Business looking for Key Solutions (single site small)

• Small & Medium enterprise looking for Hybrid/PBX Solutions (1-5+ sites 10-100+ users)

• Medium & Large Enterprises looking for PBX Solutions (1000-5000 total users across 100+ sites)

Replacement of old systems driving upgrades to IP

Source: Synergy Research Aug 2003

LAN Telephony Adoption (Average of Analysts)United States Line Shipments

IP Telephony Inflection Point


The Market Favors Simplicity• Ethernet versus Token Ring, FDDI, ATM

• Packet versus Cell

• TiVo versus VCR

• SIP versus H.323, MGCP, Proprietary


Ingress T1/PRI Ingress GW Directory

Server Gatekeeper AccountingServer Egress GW Egress

T1/PRI

Q.931 SETUP

H.225/RAS ARQ (AuthenticationAdmitLocationRequest)

ODBC Directory Lookup Request

ODBC Directory Lookup Response

MSMQ Ingress Start CDR

H.225/RAS ACF (AuthenticationAdmitLocationResponseSuccess)

Q.931 CALL_PROCEEDING

H.225/Q.931 SETUP (fastStart)

H.225/RAS ARQ (AuthenticationAdmitEgressRequest)

H.225/RAS ACF

Q.931 SETUP (ANI,DNIS)

Q.931 CALL_PROCEEDING

Q.931 PROGRESS

H.225/Q.931 PROGRESS

Q.931 PROGRESS

Q.931 ALERTING

H.225/Q.931 ALERTING

Q.931 ALERTING

In-band audio established (examples include error messages or in-band ringback)

In-bandFeedback

Out-of-bandFeedback

Q.931 CONNECT

Q.931 CONNECT_ACKNOWLEDGE

H.225/Q.931 CONNECT

Q.931 CONNECT

Q.931 CONNECT_ACKNOWLEDGE

MSMQ Egress Start CDR

H.225/Q.931 CALL_PROCEEDING (fastStart)

H.245 Full Duplex Logical Audio Channel Is Now Open

H.323

Ingressto

Egress

Call Set-Up!!


SIP Phone to PSTN Phone Call FlowSIP Phone A SIP PROXY CLASS 5

OFF HOOK

ON HOOK

SIP GWYINVITE F1

407 PROXY F2

ACK F3INVITE F4 INVITE F5

100 TRYING F6 Q.931 Call Set-Up

180 RINGING F7180 RINGING F8 Q.931 ProceedingQ.931 ProgressQ.931 Alerting

200 OK F9200 OK F10

ACK F12ACK F11

RTP w/ SDP (ESTABLISHED) F13 Analog Voice

Q.931 Connect ACK

BYE F14BYE F15 Q.931 Disconnect

200 OK F17200 OK F16 Q.931 Release

Q.931 REL-Complete


DMS 250Class 3

SS7 - STP

DMS100Class 5

ENTERPRISE GATEWAY

DMS 250Class 3

SS7 - STP

DMS100Class 5

IMTT-I

IMTT-I

10/10010/100

SIPSIP

SIP SIP

A-LINKS A-LINKS

CHICAGO HOUSTON

ACCTDIR/PROV PROXY

IPIPBackboneBackbone

DMS100Class 5

DMS100Class 5

PRI/T-IPRI/T-I

MCI “IP Communications” (circa 2002)


IP Telephony Is Step #1After IP telephony, what applications are you

considering for your Converged Network?

%Nemertes Research, 2004

0 10 20 30 40 50 60

Contactcenter / CTI

Collaboration

AudioConferencing

Messaging

VideoConferencing

IP Telephony must be more than dial tone…

IP Telephony must be more than dial tone…


SIP - It’s Not Just Dial Tone• RFC 2543 abstract (1999)

– The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol for creating, modifying and terminating sessions with one or more participants. These sessions include Internet multimedia conferences, Internet telephone calls and multimedia distribution.


SIP-Based Services Voice Mail (IVR) Interactive Voice Response Unified Messaging User Mobility Presence Personalized Call Treatment Find Me/Follow Me Instant Messaging Conferencing


Next-Gen Voice Messaging• Voice Messaging has been ubiquitous since 1995

– Telephone answering primarily

• Unified Messaging has been advertised, but not delivered- Why?

• Unified Messaging – Definition?– Practical “on paper”– Not practical to deliver

• IP Technology will make Next Gen applications as ubiquitous as VM has been– Practical to Implement - new architecture, new technology– Tools to migrate– Reliable - simple design with redundancy


IP Messaging Value Proposition• Problem

– Proliferation…• Connected devices • Communications accounts

– Leads to an unmanaged explosion of connection demands—missed messages, multiple log-ins

• Solution– UMS puts the control back in the hands of the user

• How?– Single Smart Mailbox

• Message media translation– voice and text• Network bridging – PSTN, IP• Device agnostic – cell, PDA, PC, pager

– Enables users to set up access rules – Intelligent routing for messages


Architectural Differences

Stateless SIP Proxy

INVIT

E INVITE

RTP


Architectural Differences

B2BUA

INVIT

E INVITE

RTP

200 OK 200 OK


APPLICATION

BUILDER

Network Infrastructure

Routers, Switches, Firewall, etc. Media Gateways

Communication PortalWirelessAccess

SpeechAccess

Communication Services

Call Processing, Availability, Directory,Location, Authentication etc.

Media Services

Video, Speech

Business AppsGroupware, IM, ERP, CRM etc.

SecurityServices

SystemMgmt.Svcs.

DatabaseServices

LDAP,JDBC

SNMP

Converged Communication Applications Suite

IP TelephonyIP Messaging

IP ConferencingCollaboration Contact Center

Personal Assistant

SIP CCXML XML VoiceXML

XML, VoiceXML

WebServices


Summary• SIP is becoming de facto choice for IP

Communications– Interoperability– Large developer community

• Architecture matters! Choose platform with modular services, published APIs, and flexibility to adopt new protocols

Documents

SIP-Based Enterprise Communications Platforms