H.325 / AMS

ITU-T H.325 (also called the "Advanced Multimedia System" or "AMS") was a modern multimedia system project under development by the ITU-T SG16 in the late 2000s and early 2010s.

The purpose of the H.325 project was to create a new multimedia terminal and systems architecture that supported distributed and media-rich collaboration environments. A key element of that work was enabling a plurality of devices and applications, each of which could be independently developed by various hardware and software vendors, to work seamlessly together to provide the user with a very rich multimedia communication experience.

As an example of what H.325 would enable, it would have been possible to simultaneously utilize a voice/video application on a tablet, file transfer on a mobile phone, application sharing on a personal computer, and whiteboarding using a dedicated physical whiteboard, all with virtually no effort on the part of the user. The tight integration between these applications truly increases the value of multimedia communications systems.

H.325 proposed an attractive, modern signaling syntax that used JSON. The intent was to make it easy for developers to create applications ranging from WebRTC applications to dedicated hardware and software applications.

Following the worldwide financial downturn in 2008, momentum on H.325 was substantially reduced. Work on the protocol proceeded slowly, but was finally abandonded in 2015.

Resources: ITU-T AMS Project Description, H.325 Information Site, VoIP Information Site

See Also: Voice over IP (VoIP), H.323, Session Initiation Protocol (SIP), H.248 (or Megaco), Media Gateway Control Protocol (MGCP)