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The OmniMux 400XL is a multifunctional 5250 twinax over fiber super-multiplexer-star. It concentrates 8 ports from a local or remote controller and delivers them to a maximum of 8 different distant locations via 8 fiber pairs. The 400XL performs the function of up to 8 standard OmniMux 400 multiplexers or fiber converters.The OmniMux 400XL utilizes a digital Phase Locked Architecture (PLA). This technology facilitates reliable data acquisition with data rate variations of -2% to +4%. This facilitates consistent connectivity with all IBM and compatible devices and host models. It also facilitates a high degree of noise and crosstalk immunity. The XL monitors all incoming data streams simultaneously, checking for data activity and errors. Once the valid data frame is recovered, it is processed and checked. True data activity or errors are displayed for each link using LED displays thus helping in monitoring network operation and problem isolation. When a valid data frame header is recognized, the data frame "Cuts Through" and is retransmitted. It is fully regenerated and restored to its full original amplitude, and any lost start bits are reconstructed and regenerated. Each data bit is reshaped and reclocked at a 50% duty cycle eliminating any clock jitter and ensuring reliable connectivity.