The SuperStack II Switch 1000BASE-SX module supports high-performance, fault-tolerant interworkgroup and workgroup-to-backbone connection. The easy-to-install module provides a full-duplex 1000BASE-SX multimode fiber interface to another Fast Ethernet or Gigabit Ethernet switch over distances up to 275 meters. Full-duplex Gigabit Ethernet provides up to 2Gbps throughput, eliminating network bottlenecks. The module supports both 802.1D spanning tree and resilient links.