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Polycom 4300T manual Classifying, Upstream Traffic Management

Models: 4300T

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User Guide V2IU 4300T Converged Network Appliance

are applied to traffic in both the upstream (LAN to WAN) and downstream (WAN to LAN) direction. Each direction is independent of the other and can support different size priority queues.

Classifying

High priority voice and video traffic generated by endpoint devices is automatically identified by the V2IU’s VoIP Application Layer Gateway. Other VoIP devices (not making use of the ALG) can be defined as high-priority by their IP address. The user configures these addresses into the priority list in the Traffic Shaper section of the 4300T web GUI.

As the 4300T processes packets they are identified as either high or low priority based on this configuration. Packets identified as high priority are marked as such in the TOS bits of their IP header, allowing prioritization by downstream routers. The TOS field is set to 12 hexadecimal “minimize delay and maximize throughput” This value overwrites any prior value.

Upstream Traffic Management

The 4300T appliance uses a combination of Class Based Queuing and simple classless queuing to send data in the upstream direction. The Class Based Queue (CBQ) consists of two priority classes (high and low), a scheduler to decide when packets need to be sent, and a traffic shaper to rate-limit by delaying packets before they are sent. Each of these is described in more detail below.

Priority classes

Voice and video traffic is placed in the high-priority queue and data traffic is placed in the low-priority queue. The IP header TOS field of packets in the high-priority queue is set to “minimize delay and maximize throughput”.

Scheduler

High-priority data is polled before low priority data, thereby minimizing the latency for voice and video traffic. High-priority data is allowed to use up to 85% of the total WAN bandwidth. Although preferential treatment is given to high-priority data, 15% of the WAN link is always reserved so that low-priority data is not starved.

High priority data is polled before lower priority data to reduce overall latency for voice traffic.

Traffic shaper

To smooth bursts from high speed data links (typically from the LAN Ethernet heading to the WAN) the 4300T appliance uses a buffer that clocks data out at rates not exceeding automatically-calculated maximums. Low-priority data is

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Polycom 4300T manual Classifying, Upstream Traffic Management
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4300T specifications

The Polycom 4300T is an innovative communication device designed for businesses seeking reliable and high-quality audio conferencing solutions. As part of Polycom's renowned lineup of voice communication products, the 4300T delivers superior sound quality, making it an essential tool for any professional environment.

One of the standout features of the Polycom 4300T is its Acoustic Fence technology, which effectively eliminates background noise, allowing participants to focus on the conversation without distractions. This feature is particularly beneficial in open office settings where ambient noise can be a significant barrier to clear communication.

The device is designed with a user-friendly interface, making it accessible for users of all levels of tech-savviness. Its intuitive controls and easy-to-read display facilitate seamless operation during meetings, ensuring that users can engage in discussions effortlessly. Additionally, the 4300T boasts a multi-device connectivity capability, allowing it to connect easily with various devices such as smartphones, tablets, and computers via Bluetooth and USB.

Another remarkable characteristic of the Polycom 4300T is its exceptional audio quality achieved through the use of Wideband technology. This allows for crystal-clear voice transmission, making conversations more natural and easy to follow. The device also features a built-in speakerphone, which adds to its versatility, allowing for hands-free communication in smaller conference rooms or personal office spaces.

The 4300T supports both SIP and H.323 protocols, enabling compatibility with a wide range of communication systems and platforms. This flexibility is crucial for organizations that utilize different software and hardware for their communication needs, as it simplifies integration into existing infrastructures.

Moreover, the Polycom 4300T is built to deliver durability and longevity. Its robust design ensures that it can withstand the rigors of daily use in busy corporate environments. The device is also energy-efficient, making it an environmentally friendly choice that helps businesses save on energy costs.

In conclusion, the Polycom 4300T is a formidable audio conferencing solution that combines advanced technologies, user-friendly features, and durability. Its Acoustic Fence technology, exceptional audio quality, multi-device connectivity, and compatibility with various protocols make it an invaluable asset for businesses aiming to enhance their communication capabilities. Investing in the Polycom 4300T ensures that organizations can conduct clear, effective meetings, fostering collaboration and productivity among teams.