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Polycom
®
RealPresence DMA
®
7000 System Overview
Polycom, Inc. 15
The API uses XML encoding over HTTPS transport and adheres to a Representational State Transfer
(REST) architecture.
To browse the RealPresence Platform API reference documentation, go to Help > RealPresence Platform
API Documentation in the system’s web interface.
A Polycom RealPresence Resource Manager system can integrate with the RealPresence DMA system via
the API. No separate license is needed in order for the RealPresence Resource Manager system to use the
API. It provides the full programmatic access to the RealPresence DMA system described above and
enables users of the RealPresence Resource Manager scheduling interface to:
● Schedule conferences using the RealPresence DMA system’s MCU resources.
● Set up Anytime conferences. Anytime conferences are referred to as preset dial-out conferences in
the RealPresence DMA system (see Edit Conference Room Dialog).
SVC Conferencing Support
This version of the Polycom RealPresence DMA system supports the Annex G extension of the H.264
standard, known as H.264 Scalable Video Coding (SVC), for both point-to-point and multipoint (VMR) calls.
SVC is sometimes referred to as layered media because the video streams consist of a base layer that
encodes the lowest available quality representation plus one or more enhancement layers that each provide
an additional quality improvement. SVC supports three dimensions of scalability: temporal (frames per
second), spatial (resolution and aspect ratio), and quality (signal-to-noise ratio).
The video stream to a device can be tailored to fit the bandwidth available and device capabilities by
adjusting the number of enhancement layers sent to the device.
For multipoint conferencing, the MCU doesn't have to do processing-intensive mixing and transcoding to
optimize the experience for each device. Instead, it simply passes the video stream from each device to
each device, including the enhancement layers that provide the best quality the device can support.
Polycom’s SVC solution focuses on the temporal and spatial dimensions. It offers a number of advantages
over standard AVC conferencing, including:
Note: Asynchronous API communication
The API communicates asynchronously. Clients subscribing to event notifications via the API must be
prepared to receive notifications out of order.
Note: Integration with a RealPresence Resource Manager system
Integrating the Polycom RealPresence Resource Manager system with the RealPresence DMA
system via the API is separate and distinct from integrating the RealPresence DMA system with a
RealPresence Resource Manager system.
• The former enables RealPresence Resource Manager users to obtain information from and use
functionality of the RealPresence DMA system that would otherwise be accessible only in the
RealPresence DMA system’s management interface.
• The latter enables the RealPresence DMA system to retrieve site topology and user-to-device
associations from the RealPresence Resource Manager system.
For convenience, however, when you integrate your RealPresence Resource Manager system to the
RealPresence DMA system, the RealPresence DMA system automatically integrates itself back to the
RealPresence Resource Manager system so that the RealPresence DMA system will have the site
topology and user-to-device information that the RealPresence Resource Manager system expects it
to have.