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Polycom manual Closer Look at Traffic Management in the 4300T

Models: 4300T

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Configuring the 4300T

Determining the maximum number of concurrent calls

The maximum number of concurrent calls that can be supported by the WAN access link is calculated using the following formula:

Max calls = (Maximum WAN upstream bandwidth * .85)/VoIP codec rate where,

Maximum WAN upstream bandwidth = value entered in step D above (in Kbps)

VoIP codec rate = 85.6Kbps for G.711 voice devices or 29.6Kbps for G.729 voice devices.

The maximum WAN upstream bandwidth is multiplied by .85 in the formula above to reduce the total bandwidth available for voice calls by 15%. This reduction is necessary because the 4300T automatically reserves 15% of the total WAN bandwidth for low priority data traffic so that it is not starved completely. Starving data traffic completely would increase the number of retry attempts and exacerbate congestion on the link during periods of peak usage.

Examples

The maximum number of G.711 voice calls supported by a T1 (1.536 Kbps) WAN is calculated as follows:

(1.536*.85)/85.6 = 15.3 or 15 total voice calls.

The maximum number of G.711 voice calls supported by a 768Kbps fractional

T1 WAN is calculated as follows:

(768*.85)/85.6 = 7.6 or 7 total voice calls

The maximum number of G.729 voice calls supported by a 256Kbps fractional

T1 WAN is calculated as follows:

(256*.85)/29.6 = 7.4 or 7 total voice calls

After determining the maximum number of voice calls CAC is enabled as follows:

1.Select the Enable Call Admission Control checkbox.

2.Enter Maximum number of calls allowed as calculated above.

3.Press Submit.

A Closer Look at Traffic Management in the 4300T

The traffic management mechanisms provided by the 4300T are designed to ensure high priority real-time voice and video traffic is processed before lower priority data traffic. At the same time, bandwidth not in use by voice and video traffic is made available so that data traffic can burst up to full line rate making efficient use of WAN bandwidth. Traffic management mechanisms

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Page 59
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Polycom manual Closer Look at Traffic Management in the 4300T
Page 58 Page 60

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.