Converged Services Igor Faynberg (faynberg@lucent) Hui-Lan

Converged Services Igor Faynberg ([email protected]) Hui-Lan Lu ([email protected]) Bell Labs, Lucent Technologies Workshop on IP-Networking and MEDIACOM 2004, Geneva Slide 1, Faynberg & Lu SG 13 Workshop

Outline What do we mean by convergence? Adjusting the PSTN to the Internet – Access to the Internet over the PSTN lines – Internet off-load Adjusting the Internet to the PSTN – – – – – – – IP telephony PINT SPIRITS Unified Messaging Voice Access to the Web Porting of PSTN intelligence into the IP telephony world (SIN) VPN Conclusion Slide 2, Faynberg & Lu SG 13 Workshop

Three Aspects of Convergence 1) Interworking of “traditional” PSTN with the IP infrastructure to support voice over IP 2) Interworking of PSTN with the IP infrastructure to deliver IPbased service control for “traditional” PSTN calls (i.e., IP Telephony without voice over IP) 3) Interworking of PSTN with the IP infrastructure to provide remote access to IP networks via PSTN lines Slide 3, Faynberg & Lu SG 13 Workshop

Adjusting the PSTN to the Internet (PSTN access to IP networks) Exploiting the bandwidth that can be supported by two-wire telephone access lines Pulse Code Modulation (PCM) modem Digital Subscriber’s Line (DSL) Offloading Internet traffic from the PSTN Slide 4, Faynberg & Lu SG 13 Workshop

PSTN Congestion due to Internet Traffic PSTN Internet User Ingress Switch SS7 Network Egress Switch Remote Access Server ISP Internet congestion Slide 5, Faynberg & Lu SG 13 Workshop

An Internet Offload Solution Ingress Switch PSTN Internet User SS7 Network Egress Switch Softswitch Remote Access Server ISP Internet Slide 6, Faynberg & Lu SG 13 Workshop

Adjusting the Internet to the PSTN (two aspects) 1) Support of the IP telephony requirements: A new IP endpoint--IP telephony gateway--is required to interconnect the Internet and the PSTN QoS must be enforced The IP and PSTN naming and addressing schemes must interwork 2) The Internet-based support of the PSTN services requirement: Keep the intelligence at the edges! (Or, at least, share it with the edges) Slide 7, Faynberg & Lu SG 13 Workshop

PC-to-PC (1) PSTN as an access vehicle IP Network PSTN Network Access Server dialup access Slide 8, Faynberg & Lu SG 13 Workshop

PC-to-PC (2) PSTN as the backbone transport PSTN Enterprise B Enterprise A IP PBX Gateway Slide 9, Faynberg & Lu Gateway SG 13 Workshop IP PBX

Phone-to-PC or vice versa IP Network PSTN Gateway Slide 10, Faynberg & Lu SG 13 Workshop

Phone-to-phone IP trunking Home Gateway PSTN IP Network Enterprise Gateway Slide 11, Faynberg & Lu Gateway SG 13 Workshop

Why IP telephony? Toll bypass avoids long-distance call charges. One type of networks for both voice and data simplifies network operation, administration, and management. Easy integration with other IP applications promises richer than ever telephony services. Slide 12, Faynberg & Lu SG 13 Workshop

Converged IP Telephony Architecture IVR System Public Switched Telephone Network SS7 voice Media Gateway H.323 Terminal SCP H.248 voice Soft Switch SIP User Agent SIP/H.323 SIP User Agent H.323 Terminal SIP Server Cloud Gatekeeper Cloud IP Network Slide 13, Faynberg & Lu SG 13 Workshop

PSTN/Internet Interworking (PINT) PINT Client Internet PINT Gateway SIP SCP PSTN Requests Request to call Request to hear content Request to fax Future: Request to Conference Internet Internet Enhancing Enhancing PSTN PSTN Call Call Control Control Slide 14, Faynberg & Lu SG 13 Workshop

PINT has successfully concluded, but There are potential services for the future Slide 15, Faynberg & Lu Multimedia conferencing Free calls (paid by advertisers) – with the profiling feature Speed Call list provisioning Service Subscription Follow-me service provisioning Access to communications bills Account information changes VPN Provisioning SG 13 Workshop

Services in the PSTN/IN Requesting InTernet Services (SPIRITS) SPIRITS Server Internet SPIRITS Gateway SCP PSTN Requests & Notifications Internet Call Waiting Internet Caller ID Voice Mail arrival Phone Off-hook detection Utilizing Utilizing the the Internet Internet for for PSTN PSTNService ServiceNotification Notification Slide 16, Faynberg & Lu SG 13 Workshop

Joint PINT/SPIRITS Architecture Telephony SPIRITS Gateway Server Telephony PINT Gateway Client B PSTN A Telephony PINT Gateway Server Telephony SPIRITS Gateway Gateway IP Network Switch C Telephony SPIRITS Gateway Client Service control Slide 17, Faynberg & Lu SG 13 Workshop

SPIRITS Status 1) The Implementation RFC (informational) RFC 2995 has been published 2) The Architectural RFC candidate has undergone WG last call 3) The Requirements RFC candidate is in the process of consensus building 4) The protocol work is under way Slide 18, Faynberg & Lu SG 13 Workshop

Unified Messaging Fax Sender Fax Reader Voice Directory Voice Mail E-Mail Visual Mail Hello. E Beep. Beep. Incoming Message Notification The ability to create, send and retrieve any type of message–anytime, anywhere– with any terminal. Slide 19, Faynberg & Lu SG 13 Workshop

Voice Access to the Web Residential Stock quotes Traffic conditions Web-based Yellow/White pages Local Events Personalized Web page services Corporate Data Internet HTTP PSTN Intranet VoiceXML Switch Voice Browser Web / Application Server Voice Service Logic Voice Voice Service Service Logic Logic on on Web Web Servers Servers Slide 20, Faynberg & Lu SG 13 Workshop

SIP/INAP Interworking (SIN) [IETF Design Team] Intelligent Peripheral IP Network SIP Telephony Soft Switch Gateway INA P Service Control Point Slide 21, Faynberg & Lu Switch SG 13 Workshop PSTN

Virtual Private Network PSTN Access Server Tunnel Gateway Enterprise IP Network Island Enterprise IP Network Island Tunnel Gateway Internet Tunnel Gateway Slide 22, Faynberg & Lu SG 13 Workshop

Conclusion Regardless of the economical success of the IP telephony, there is room for integration of the traditional telephony and Internet We consider convergence to be co-existence and symbiosis of the evolving PSTN and Internet (not the consumption of one by another); this symbiosis is manifested in integration Integration of pure IP telephony with the PSTN has been worked in the IETF enum and megaco WGs together with ITU-T SG 2 and SG 16, respectively. Intelligent Network is a natural PSTN platform to support such integration; ITU-T SG 11 and IETF (pint, spirits) have had a productive cooperative effort to this end. The emphasis of the industry now is on enhanced services rather than “pipes”; services are key differentiators RECOMMENDATION: the standards organizations should concentrate on providing building blocks for developing services in converged networks Slide 23, Faynberg & Lu SG 13 Workshop