Our fiber optics switch is designed to improve network bandwidth within the workgroup or backbone applications by offering 100Base-FX fiber ports for distance requirement longer than 100 meters. It provides dedicated bandwidth on each port, thus accelerates data transmission and effectively segments the network.NEA21635 is equipped with ST Tx/Rx connectors and NEA21636 is equipped with SC Tx/Rx connectors. Each port has Link/Activity, 100Mbps, and Full-Duplex/Collision LEDs. Power LED clearly indicates the status of electrical power. These LEDs offer a great aid in diagnosing line troubles, and indicate when data is being received or transmitted. The switch features multiple, simultaneous conversations across a 2.66 Gbps backplane. It supports IEEE 802.3x flow control for full-duplex and Back Pressure for half-duplex. Each fiber port is selectable for either full- or half-duplex mode. This item comes with brackets for mounting to a 19" rack.