The Basics of SIP: Creating Information Rich Real Time Communications

1. Serving the EDGE The Basics of SIP:Creating Information Rich Real Time Communications Rudy Mazza Senior Voice Technologist Alcatel Enterprise Solutions Division

2. Presentation Goals • Understand the challenge of providing information rich real time services to edge of your enterprise • Understand the basics of SIP and information rich real time communication • See SIP in Combination with other Internet technologies to bring services to the Edge • See the future potential of SIP

3. Agenda • Business Context – Real Time Services at the edge of the enterprise • SIP Defined – Real Time vs. Non Real Time • SIP in Use • Why You Should Care

4. The Challenge of the EDGE For the most part, the largest inefficiencies are now at the edge of the enterprise – in connecting core processes with your business partners or, at the other end, your sales channel. Nick Morgan and Loren Gary Should You Fire Your CIO? Harvard Management Update – July 2002

5. The Disparity between Locations Databases Directories Remote Worker SCM DHCP ERP email LDAP DNS CRM Internet Headquarters LAN Private Branch Office PBX PSTN Data Voice

6. Bringing knowledge – based services to the EDGE New levels of Richness and Reach Blown to Bits Philip Evans Thomas S. Wurster Enablers • Explosion of Connectivity • Dissemination of Standards Richness Traditional Trade-off Reach

7. Human to human IP Phones Softphones Mobile phones PIM HTML, WML, VXML Human to business Telephony 500+Mobility MessagingWorkplace , directoryVertical applications Business to business/customers ACD, MIS, IVR, Desktop CTI Internet suite, tele-marketing CRM connectors Human to system Secure element access Secure network access Secure application use Com.Applications IP-PBX Contact Center Suite Network Services Remote user BranchOffice System to Business Remote survivability Cost optimization Full features Human to SystemMAC, performance monitoring, call accounting The State of the Enterprise Today Desktop Wiring closet Internet WAN Media Gateway PSTN System to System Dual IP/TDM Distributed architecture LAN, WAN Multi protocol QSIG, SIP, H323...

8. Voice & Data Networks Business applications Web Sites Collaboration Directories E-mail Speech Access Corporate Resources Anywhere Any Device Information and Real Time Communication The Power of Combination How?

9. What Combination Delivers • Any location, any time, real-time communication

10. Multimedia Applications Voice Video Data SIP RTSP SAP RSVP SDP UDP TCP IP (ATM...) SIP from a technical perspective • The Session Initiation Protocol (SIP) is a signalling protocol that belongs to the application layer of the ISO model • SIP is in charge to open, modify and close the sessions between two or more users

11. Data applications H 3 2 3 E n t i t y System control System control VIDEO AUDIO Codec H261, H263 Codec G711, G723, G729 H225 Call Control H225 RAS Control H245 Control Telematic T120 RTCP RTP H225 frame layer H225 frame layer TCP UDP IP H323 protocols reminder

12. System control AUDIO VIDEO S I P E n t i t y SIP SDP SAP RTCP RTSP RTP RSVP TCP UDP IP SIP Layers

13. SIP – A Practical View • SIP provides new access and connection capabilities • Choice of communications devices • Choice of media • Find me/hide me capabilities • SIP uses URL addressing like email • sip: john@alcatel.com • sip: +18185551212@alcatel.com • SIP delivers a new level of mobility • Reach someone regardless of device • PC, legacy telephone, IP phone, palm device, cell • Reach someone regardless of location • Like email • Log in and your presence is established • Reach someone regardless of address • Does not require SIP address • Can use email address/phone number • Just register and SIP will find you Digital Phone PWT SIP Softphone IP Phone SIP Phone PSTN/ISDN Gateway LAN Call Server (SIP/Linux) Internet LDAP Directory SIP Client SMTP changed e-mail – SIP will change communications

14. Application layer signaling protocol Uses RTP – Real Time Protocol for actual communication Establishes, modifies and terminates multimedia sessions over IP between intelligent devices Shares features with HTTP Integrates with enterprise IP networks DNS LDAP Supports Multipurpose Internet Mail Extension (MIME) Creates user presence and device information Main goal is to provide access NOT content 200 OK 180 Ringing 100 Trying Ack Bye 200 OK Session Initiation ProtocolIn Action RTP data (communication) Invite SIP: alan.alcatel.com SIP agent John SIP agent Alan

15. SIP – Serving the Edge • SIP enterprise service examples • Call redirect to a web page or email if the called party is busy • Web interactive voice response • Presence-based call routing • User follow-me enabled by user’s location • Dynamic media allocationbased on presence, available terminals and user preferences HTTP, SIP Conference Server Billing RADIUS SIP SIP Application Server Web Server Database LDAP/SQL HTTP SIP SIP Presence Server Media Server SMTP SIP SIP E-mail Server Location Server IM Server

16. At a practical level It’s about the end user and the system administrator Greater Choice of Devices Find Me Better Interoperability End User Control Hide Me

17. SIP and the POWER of COMBINATION • SIP and QSIG in the IETF • SIP and wireless • SIP and multimedia • SIP and business continuity

18. Summing it Up • IT DOES matter as we conquer the challenges of providing services the edge of the enterprise • SIP is part of a group of Internet technologies that create a powerful combination • SIP is still emerging with plenty of potential • Don’t forget, it’s about the end user and the administrator

19. Conquering the EDGE Thank you for your attention