Presents H.323 Forum 2002

ITU-T SG16 With Focus on H.323 Activities Presented by Paul E. Jones Rapporteur ITU-T Q2/16 Cisco Systems

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Multimedia Convergence IP-based networks open the door for a revolution in communications ITU-T SG16 is focused on the convergence of voice, video, and data communications Convergence is considered by many to be the key to realizing new market growth

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Major Activities of SG16 Voice coding Video coding Multimedia signaling Security Quality of Service (QoS) Multimedia architecture User, Terminal, and Service Mobility Emergency Telecommunications

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA ITU-T SG16 Structure WP1 Facsimile and Modems WP2 MM Platform and Interworking WP3 Media Coding WP4 MM Framework E - Media coding 6 - Advanced video coding 7 - Wideband speech coding 8 - Speech coding at 4 Kbit/s 9 - Variable bit-rate speech coding 10 - Software tools and maintenance of speech coding standards 15 - Distributed speech recognition/distributed speaker verification D - Interoperability of MM Systems and Services F - Quality of Service and End to End Performance G - Security 1 - MM Systems, Terminals and Data Conferencing 2 - MM over Packet Networks (H.323) 3 - Infrastructure and Interoperability 4 – Video and Data Conferencing using Internet Supported Services 5 - Mobility for MM Systems and Services H - Accessibility to MM Systems and Services 11 - Modems 12 - DCE-DCE protocols for the PSTN and ISDN 13 - DTE-DCE Interfaces and Protocols 14 - Facsimile terminals A - MediaCom 2004 B - MM Architecture C - MM Applications and Services ETS – Emergency Telecommunications Services

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Voice Coding Years of experience in voice coding Virtually all VoIP systems use ITU-T voice codecs Popular examples: G.711, G.722, G.722.1, G.723.1, G.726, G.728, G.729

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Video Coding Years of experience in video coding Most IP based video systems use ITU-T video codecs Popular examples: H.261, H.262, H.263 Work is underway on H.264 (formerly referred to as H.26L), which will provide quality similar to H.263 and MPEG-2, but at a much lower bit-rate

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Multimedia Signaling Data communications –Modems –Fax –Data Conferencing Call and Conference Control –H.320, H.243 –H.324, H.245 –H.324/M –H.323, H.225.0, H.245 Media Gateway Control

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Modems The ITU-T is recognized as the authority on modem communication standards, with popular standards like V.34, V.90, V.92, etc. On October 25, 2002, ITU-T SG16 approved V and related procedures for H.323, which defines how to carry modem signals over IP networks

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Fax Like the area of modems, the ITU-T is recognized as the authority of fax communication standards ITU-T Recommendation T.38 defines how to carry fax signals over IP networks and is used by H.323 systems for this purpose

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Data Conferencing The T.120-series Recommendations address data communications, with protocols that facilitate application sharing, file transfer, chat, and a shared whiteboard T.120 may be used as a stand-alone data application protocol or within the context of a voice/video call Most recent work completed in 2000 (virtual meeting room management)

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Call and Conference Control H.320 – ISDN video conferencing standard H.324 – Multimedia communications standard for low bit-rate connections H.324/M (Annex C/H.324) – Facilitates the use of H.324 within error-prone environments, like mobile systems H.323 – Packet-based multimedia communications standard

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Media Gateway Control ITU-T H defines the protocol for communication between a Media Gateway Controller, such as an H.323 MGC, and a Media Gateway H was developed in cooperation with the IETF (MEGACO working group) The second version of the protocol was approved in February 2002 Numerous packages, which enhance the base protocol with new functionality, have been defined and more are in development

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA H.248’s Role Media Gateway Controller (“Softswitch”) H.323 H.248 SCNRTP Media Gateway SCNRTP Media Gateway SCNRTP Media Gateway SCNRTP Media Gateway SCNRTP Media Gateway SCNRTP Media Gateway

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Security ITU-T Recommendation H.235 addresses the security needs of H.323 Features signaling security protection of H and H.245 in terms of cryptographic authentication, message integrity, (privacy), confidentiality and key management H.235 defines RTP media payload encryption and will also adopt SRTP in the next version H.235 Version 3 scheduled for May 2003

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Quality of Service (QoS) QoS is getting a lot of focus, with work is on-going in a number of areas: –QoS architecture –Service classification –Call processing performance –Techniques and procedures for service priority –Signaling to transport domains –QoS management –QoS policy server signaling –Error resilience

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Multimedia Architecture Quality of Service and End-to-End Performance Accessibility (e.g., text/total conversation) Security Interoperability with legacy PSTN systems, as well as other H.32x systems Overall system architecture and development of new protocols

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Mobility Introduce signaling to H.323 and other H.32x systems to facilitate user, terminal, and service mobility Recently published: –H Mobility management and inter-/intra domain communication –H Mobility within H.323 systems –H Security procedures for H.510 Active work in the area of presence and instant messaging

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA ETS Emergency Telecommunication Services: generalization from PSTN (E.106) to IP transport and associated multimedia content New question: Q.I (Oct/2002) New Recommendation F.706 (May/2003) on International Multimedia ETS, extending E.106 to IP transport Focuses on priority, security, and availability during emergency situations for authorized disaster relief users

H.323 Version 4 and Beyond

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA H.323 at Present Widely used for the application of VoIP Video conferencing market growing: enterprise, educational institutions, and service provider markets Good integration with the PSTN Version 4 primarily focused on features that enabled it to excel in the voice wholesale market Wide range of products available

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Recent Enhancements Annex Gv2 – Communication between and within a domain Annex P/H.323 – Modem over IP H – Framework for the Generic Extensibility Framework H – Number portability H – Circuit status map H – Call priority designation H – Duplicate Q.931 IEs

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Recent Enhancements (cont.) H – Extended Fast Connect H – Digit maps H – Querying for alternate routes H – QoS monitoring/reporting

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Status of H.323v5 Scheduled for approval in May 2003 Focus is on stability –Deliberate attempt to reduce the number of changes over previous revisions –Corrections and clarifications are being applied as necessary –Most new features appear as optional extensions to the base protocol (H.460.x series documents) –Few minor enhancements

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Next Steps Quality of Service Provisioning and management –Residential deployments –Large video conferencing networks Security enhancements (SRTP adoption, etc.) IP networking issues (firewall, NAT, IPv6) Address resolution and Gatekeeper discovery via the H.323 URL ENUM support

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Next Steps (cont.) Directory services integration (LDAP) Security enhancements Making it more usable –Interoperability –Telephone for audio, PC for video/data –Improved data applications (remote PC control, etc.) –Simplifying user setup and maintenance (“just plug it in”)

Sponsored in part by: H.323 Forum – November 2002 – New York, NY, USA Thank You!