Electro-optical fiber routing switcher is a versatile, multipurpose, non-blocking, transparent switch that provides high-speed switching between ports with minimal effect on overall network latency. The EOS4000 series is capable of switching digital signals up to 4.25 Gbps with any of its 288 ports, all in a compact sizes from 1 RU up to 9 RU chassis. The EOS-4000 is designed to accept up to three modular port cards with up to forty-eight Small Form- Factor Pluggable (SFP) transceiver modules per port card. Each SFP transceiver module provides the physical ports for one input-output pair. Different types of SFP transceivers support a variety of network configurations.