ET4201 series of Small For_m Factor_ Pluggable (SFP) transceiver module is specifically designed for_ the high perfor_mance integrated duplex data link over single or_ multi-mode optical fiber. These transceiver modules are compliant with the SFP Multi-source Agreement (MSA). With the ability to hot swap, these modules offer an easy way to be installed into SFP MSA compliant por_ts at any time without the interruption of the host equipments operating online.