Add a high-speed fiber port for connection to your network. The SuperStack II 100BASE-FX module adds a fiber Fast Ethernet backbone link to your switched workgroup. Great for resilient connections in mission-critical networks or when fiber backbone connections are needed to and from the stack. A high-speed backbone link can be shared by multiple units in a stack. Supports half duplex and full duplex operation: In half-duplex mode, the fiber optic segment cannot exceed 450m (1476ft) in length. In full-duplex mode, the fiber optic segments cannot exceed 2km (6562ft) in length. Use 62.5/125 micron 100BASE- FX fiber optic cable with SC connectors.