Magnum 6K16-Series Managed Fiber Switch Installation and User Guide (04/06)

4.5Flow-control, IEEE 802.3x standard

Magnum 6K16-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 10Mb port is 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 6K16-Series 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 6K16-Series Switch 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 tell 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 6K16-Series 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.

4.6Power Budget Calculations for Magnum 6K16-Series PM’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

Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss) Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km]

where the “Cable Loss” for 62.5/125 and 50/125∝m (M.m) is 2.8 dB/km, and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km,

and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km

and the “Cable Loss” for 9/125 (Single-mode) is 0.4 dB/km (LXSC25) and the “Cable Loss” for 9/125 (Single-mode) is 0.25 dB/km

(LXSC40)

and the “Cable Loss” for 9/125 (Single-mode) is 0.2 dB/km (LXSC70)

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GarrettCom 84-00136 manual Flow-control, Ieee 802.3x standard
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84-00136 specifications

GarrettCom 84-00136 is a robust and reliable networking solution widely recognized for its versatility and performance in demanding environments. Specifically designed for industrial applications, the device excels in offering connectivity within harsh conditions, ensuring seamless communication across various network topologies.

One of the standout features of the GarrettCom 84-00136 is its high port density. With multiple Ethernet ports, it allows for extensive network connections, making it an ideal choice for facilities that require numerous devices to be interlinked. This capability ensures that organizations can efficiently manage their communication needs without compromising on performance.

Another significant characteristic of the 84-00136 is its industrial-grade durability. Built to withstand extreme temperatures, vibrations, and shocks, the device is suited for applications in manufacturing plants, transportation systems, and utility networks. This level of resilience is essential for maintaining reliable operations in environments where standard networking equipment might fail.

The technology behind the GarrettCom 84-00136 includes advanced switching capabilities. With support for both managed and unmanaged configurations, users can choose the level of control and customization that best fits their network requirements. The managed features allow for extensive monitoring and management, facilitating better network performance and security.

In addition, the 84-00136 supports various communication protocols, improving interoperability with existing systems. This flexibility is crucial for organizations looking to integrate new technologies into their established networks without overhauling the entire system.

Security is another critical aspect of the GarrettCom 84-00136. The device is equipped with robust security features, ensuring that network data remains protected from unauthorized access. This is particularly important in industrial environments where sensitive information must be safeguarded against potential cyber threats.

Ease of installation and maintenance is also a highlight of the GarrettCom 84-00136. Its user-friendly design allows for straightforward setup, minimizing downtime during deployment. Furthermore, ongoing maintenance is simplified through an intuitive interface, enabling quick troubleshooting and adjustments.

In summary, the GarrettCom 84-00136 is a high-performance networking solution tailored for industrial applications. Its impressive features, including high port density, industrial-grade durability, advanced switching capabilities, and robust security measures, make it an optimal choice for organizations seeking reliable and efficient network connectivity in challenging environments.
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