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AMS project for 3rd Generation Multimedia (2009-2012) - This is an archived page, click here for a more recent version.

ITU-T Study Group 16 designed H.320, H.321, and H.322 (the first generation of Multimedia Systems and Terminals) through 1992, followed by H.323, H.324, and H.310 (the second generation) in 1996. Experience with these systems and the advancement of technology, together with the advent of the NGN, create an opportunity for a new generation of multimedia telecommunication systems offering more integrated features, greater extensibility, and more flexible growth paths for the future. We also observe that while multimedia is in the heart of NGN, so far not much attention was given to the specification of multimedia systems and terminals – a task that clearly falls under the responsibility of ITU-T SG 16.

The Advanced Multimedia System (AMS) will drive the development of a third generation multimedia terminal and system architectures able to support emerging, media rich applications that fall outside the bounds of traditional call-based communication platforms. These applications include highly converged media applications involving multiple personal and public devices, enterprise systems and network services in support of communications, collaboration and entertainment. Specifications arising from this project will enable the development of the terminals and systems, and also inter-communication between systems so applications involving multiple devices and mobile systems can be supported.

The goal of the AMS project is to create a new multimedia terminal and systems architecture that supports distributed and media rich collaboration environments. Earlier interactive multimedia protocols added media to call-based communication establishment protocols enabling multimedia telephony. In contrast, AMS is envisaged as an environment in which a user has many AMS-enabled devices including portable wireless, home entertainment and computer-based devices and is offered many applications and services that are either peer-to-peer or network-provided. The user coordinates activities across all of these environments using the modes that best fit their personal and business situation and needs or desires.

An AMS project description has been created and SG16 continues to gather requirements and is currently investigating architectures for this new system. It is expected that the core AMS system architecture and interfaces will be defined, while applications (such as voice, application sharing, presence, and video transmission) will be developed in parallel, thus providing some checks and balances to ensure that the core system sufficiently meets the needs of a variety of applications. At the same time, there is a strong desire to ensure that the complexity of any one component is minimized in order to ensure the highest degree of interoperability.

The Recommendation number H.325 has been reserved for the main specification that will result from this project. It should be noted that the intent is of producing one or more H-series Recommendations for the expected AMS protocols.

Past Milestones:

  • CfR Issued: SG 16 WP2 Rapp. meeting, Biel, Switzerland, 17 – 20 May 2005

  • Initial CfR Responses: Contributions into the SG 16 Meeting, Geneva, Switzerland, 26 July - 5 August 2005

  • Workshop titled “H.323, SIP: is H.325 next?” (San Diego, 9-11 May 2006)

  • Agreement in SG16 to create a new Question to study AMS (July 2007)

  • Creation of the AMS project description (September 2007)

  • Final approval of new Question 12/16 to develop AMS (June 2008)

Next Steps:

  • Collection of requirements continues as the terminal and system architecture also takes shape

  • Idea formulation and refinement as well as discussion of design takes place between meetings on the H.325 Design list

  • Two monthly electronic meetings are held, with meeting announcements going to the H.325 Design mailing list (schedule also posted on

  • The next Rapporteur meeting is scheduled for 8 - 12 March 2010 in Shanghai

  • The next SG16 meeting is scheduled for 19 - 30 July 2010 in Geneva

  • Completion (depends on input contributions) – 2011/2012*

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