The FlexSwitch 600XC 2Fx and 4Fx are 2 and 4-port Fast Ethernet fiber switches that can be used as a backbone switch for connecting switched or shared segments using fiber. They maximize and extend network distances and can also be used as media converters to convert half/full duplex operations and multimode, single-mode, short-wavelength, long-wavelength, SC and ST fiber options.Using the store-and-forward technology with 1-Mbyte buffer memory, the FlexSwitch 600XC 2Fx and 4Fx support a full wire-speed of 148, 800 64-byte packets per second (pps) simultaneously on all ports. As Layer 2 switches, each port of the FlexSwitch 600XC 2Fx and 4Fx is capable of MAC address learning and aging with support for up to 1, 000 MAC addresses, as well as packet filtering and forwarding. The FlexSwitch 600XC checks all packets and discards illegal or corrupted packets thus providing fragment-free packet forwarding and enhancing the overall network performance. Using the 802.3x advanced flow control specification, the FlexSwitch 600XC controls the flow of data in order to ensure data integrity. Fast Ethernet fiber ports are available with SC or ST connectors for multimode or single-mode fiber. Distances of 412 m in half-duplex and up to 58 km in full-duplex are supported.