Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide

For more information about monitoring, see "Conference and Participant Monitoring” on page 13-1.

Packet Loss Compensation (LPR and DBA)

Lost Packet Recovery (LPR) and Dynamic Bandwidth Allocation (DBA) help minimize media quality degradation that can result from packet loss in the network. Packet loss Compensation is available in AVC Conferencing Mode only and is not supported in SVC Conferencing Mode.

Packet Loss

Packet Loss refers to the failure of data packets, transmitted over an IP network, to arrive at their destination. Packet Loss is described as a percentage of the total packets transmitted.

Causes of Packet Loss

Network congestion within a LAN or WAN, faulty or incorrectly configured network equipment or faulty cabling are among the many causes of Packet Loss.

Effects of Packet Loss on Conferences

Packet Loss affects the quality of:

•Video – frozen images, decreased frame rate, flickering, tiling, distortion, smearing, loss of lip sync

•Audio – drop-outs, chirping, audio distortion

•Content – frozen images, blurring, distortion, slow screen refresh rate

Lost Packet Recovery

The Lost Packet Recovery (LPR) algorithm uses Forward Error Correction (FEC) to create additional packets that contain recovery information. These additional packets are used to reconstruct packets that are lost, for whatever reason, during transmission. Dynamic Bandwidth Allocation (DBA) is used to allocate the bandwidth needed to transmit the additional packets.

Lost Packet Recovery Guidelines

•If packet loss is detected in the packet transmissions of either the video or Content streams:

—LPR is applied to both the video and Content streams.

—DBA allocates bandwidth from the video stream for the insertion of additional packets containing recovery information.

•LPR is supported in H.323 and SIP networking environments only.

•In LPR-enabled Continuous Presence conferences:

—Both LPR-enabled and non-LPR-enabled endpoints are supported.

—The LPR process is not applied to packet transmissions from non-LPR-enabled H.323, SIP and H.320 endpoints.

—Non-LPR-enabled endpoints can be moved to LPR-enabled conferences and LPR- enabled participants can be moved to conferences without LPR-enabled (where they remain LPR-enabled).

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Polycom, Inc.

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Polycom RMX 1500, DOC2702A manual Packet Loss Compensation LPR and DBA, Lost Packet Recovery
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DOC2702A, RMX 1500 specifications

The Polycom RMX 1500, also known by its model number DOC2702A, is a significant player in the realm of video conferencing technology. Designed to enhance collaboration across various platforms, this versatile solution caters to the communication needs of medium to large enterprises, providing high-quality video, voice, and content sharing experiences.

One of the primary features of the RMX 1500 is its unparalleled scalability. The system supports up to 150 simultaneous video endpoints, allowing organizations to expand their video conferencing capabilities as needed. This flexibility makes it an ideal solution for growing businesses that require robust communication tools. The RMX 1500 can also handle a variety of video resolutions, from standard definition to HD, ensuring that users can enjoy clear and crisp visuals during their meetings.

The Polycom RMX 1500 utilizes advanced technologies such as the Polycom RealPresence technology, which significantly enhances video quality and reliability. This technology incorporates features like Adaptive Bandwidth Management, which optimizes video streams based on available bandwidth, thus ensuring a seamless experience even in less-than-ideal network conditions. This ensures that users can engage in meetings without interruptions or quality degradation, regardless of their location.

Another notable characteristic of the RMX 1500 is its robust interoperability with a wide range of video conferencing systems and protocols. This means that businesses can easily connect with partners, clients, and colleagues using different systems, reducing the barriers to effective communication. The RMX 1500 supports various codecs and standards, including H.323 and SIP, making it a versatile choice for organizations that work with multiple platforms.

Furthermore, the RMX 1500 is equipped with tools for content sharing, allowing participants to share presentations, documents, and other materials during meetings. This promotes interactive discussions and enhances collaboration among team members. In addition, the system features an intuitive user interface, making it easy for users to schedule meetings, manage participants, and control audio and video settings.

The product also places a strong emphasis on security, providing encryption options for video and audio streams to protect sensitive information shared during conferences. This commitment to security is essential for organizations that need to meet compliance standards and safeguard intellectual property.

In summary, the Polycom RMX 1500 (DOC2702A) is a powerful video conferencing solution that combines flexibility, scalability, and high-quality performance. With its advanced technologies, interoperability, content sharing capabilities, and emphasis on security, it serves as an invaluable tool for enhancing communication and collaboration in today’s fast-paced business environment.
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