Fast SwitcHub-2se User’s Guide
on the current error rate. These switching alternatives start at standard cut- through for a clean data environment, change to fragment-free cut-through for a moderate error rate, and then progress to store-and-forward for a highly contentious environment. By using this method, the Fast SwitcHub-2se delivers the best networking performance under any environment.
Features of the Fast SwitcHub-2se
∙Conforms to the IEEE 802.3 and IEEE 802.3u specifications, as well as 10BASE-T, 100BASE-TX and 100BASE-FX standards
∙Provides one independent RJ-45 10BASE-T / 100BASE-TX Ethernet station port, where each logical port consists of 1 MDI port (for connection to hubs or switches) and 1 MDI-X port (for connection to workstations or servers), eliminating the need for crossover cables
∙Provides one independent 100BASE-FX port with Rx/Tx jacks
(SC or ST type connectors can be used, depending on the model you purchase)
∙Both ports support full-duplex and half-duplex operation
∙Total bandwidth of up to 200 Mbps (when full-duplex mode is used)
∙RJ-45 port auto-senses transmission speed (10/100 Mbps)
∙Uses adaptive cut-through switching (which dynamically changes among standard cut-through, fragment free cut-through, and store-and-forward depending on the error rate)
∙Uses back pressure to eliminate frame loss by “blocking” traffic from end stations or segments connected directly to the switch when its buffers fill
∙Minimum latency of packet transmission (leading edge to leading edge) less than 20 microseconds when using cut-through switching
∙Uses “on the fly” cut-through technique to transport packets
