Flow-control, Ieee 802.3x standard | GarrettCom 4K16 specification

Magnum 4K16 Switches Installation and User Guide

(12/05)

There are no collision-domain restrictions or limitations.

The Magnum 4K-Series Switches perform half- or full-duplex mode auto- negotiation independently on all switched ports. If the device or node on the other end of

aport’s attached cable supports auto-negotiation or is set to operate as full-duplex, the Magnum 4K16 Switch will negotiate to run full-duplex. If the attached device or node doesn’t support F/H mode or fixed at Full or Half duplex (for example, if it is a 10 Mb repeater or a standard 10 Mb hub or older Switch with Fixed full duplex mode), the 4K16-Switch’s RJ-45 ports will default to operate at half-duplex.

4.6Flow-control, IEEE 802.3x standard

Magnum 4K- Series Switches incorporate a flow-control mechanism for Full- Duplex mode. The purpose of flow-control is to reduce the risk of data loss if a long burst of activity causes the switch to save frames until its buffer memory is full. This is most likely to occur when data is moving from a 100Mb port to a 10 Mb port, and the speed difference makes the 10Mb port unable to keep up. It can also occur when multiple 100Mb ports are attempting to transmit to one 100Mb port, and in other protracted heavy traffic situations.

Magnum 4K-Series Fiber Switches implement the 802.3x flow control (non- blocking) on Full-Duplex ports, which provides for a “PAUSE” packet to be transmitted to the sender when the packet buffer is nearly filled and there is danger of lost packets. The transmitting device is commanded to stop transmitting into the switched port for sufficient time to let the Switch reduce the buffer space used. When the available free- buffer queue increases, the Switch will send a “RESUME" packet to indicate the transmitter to start sending the packets. Of course, the transmitting device must also support the 802.3x flow control standard in order to communicate properly during

normal operation.

Note: When in Half-Duplex mode, the 4K16-switch implements a back- pressure algorithm on 10/100 Mb ports for flow control. That is, the switch prevents frames from entering the device by forcing a collision indication on the half-duplex ports that are receiving. This temporary “collision” delay allows the available buffer space to improve, as the switch catches up with the traffic flow.

4.7Power Budget Calculations for 4K-Series FKM’s with Fiber Media

Receiver Sensitivity and Transmitter Power are the parameters necessary to compute the power budget. To calculate the power budget of different fiber media installations using Magnum products, the following equations should be used:

OPB (Optical Power Budget) = PT(min) - PR(min)

where PT = Transmitter Output Power, and PR = Receiver Sensitivity

www . GarrettCom . com

4K16 specifications

GarrettCom 4K16 is a state-of-the-art communication platform designed to meet the demands of modern industrial networks. It combines advanced technology with robust features to provide reliable and efficient performance in challenging environments. This device is particularly well-suited for applications requiring high-speed data transfer, such as video surveillance, process control, and smart grid communications.

One of the standout features of the GarrettCom 4K16 is its ability to support 4K video streaming, making it ideal for industries that rely on high-definition video surveillance. The platform offers impressive bandwidth capabilities, allowing for the seamless transmission of large video files without compromising quality or speed. This is particularly important in security-critical applications where every frame matters.

In terms of its technological architecture, the 4K16 incorporates advanced processing power and cutting-edge software that enhance its operational efficiency. The device is equipped with multiple ports, facilitating connections to a range of devices, and supports various protocols, ensuring compatibility with existing infrastructures. This versatility allows organizations to integrate the 4K16 into their current systems with minimal disruption.

The 4K16 also excels in its rugged design, making it suitable for deployment in harsh environments. It boasts enhanced protection against dust, moisture, and temperature fluctuations, ensuring reliable performance even in challenging conditions. This durability is complemented by features such as extended operating temperature ranges and vibration resistance, making it an ideal choice for industrial applications.

Moreover, the GarrettCom 4K16 emphasizes network security as a core component of its design. With integrated security features, it safeguards sensitive data and protects against unauthorized access. This is crucial for industries that handle critical data, such as energy and utilities, where security breaches could have significant repercussions.

In summary, the GarrettCom 4K16 is a powerful and versatile communication platform tailored for industrial applications. Its high-bandwidth capabilities, robust design, and emphasis on security position it as a leading choice for organizations seeking reliability and performance in their networking solutions. Whether for video surveillance, process control, or communication in smart grid applications, the 4K16 stands out as a premium solution that meets the evolving needs of modern industries.