SFP-xxxxx family is a high performance and cost effective module for serial optical data communication applications, The interface converters meet the industry standard of SFP, This module is designed for single mode fiber operation at the wavelength of 1310nm /1550nm or multi-mode fiber operation at the wavelength of 850nm / 1310nm. The transmitter section incorporates an advance FP / DFB laser for single-mode or VCSEL for multi-mode, with temperature compensation and automatic power control circuit (APC). The receiver section incorporates an efficient InGaAs/InP PIN photodiode, with AGC for wide dynamic range. The family is a duplex LC connector transceiver, designed for use in Gigabit Fiber Channel and Gigabit Ethernet and to provide a IEEE-802.3z compliant link at 1.25Gbps applications. The modules are hot-pluggable, the characterization is performed in accordance with Bellcore specification TA-NWT-000983. All of them are housed in a stainless package and the combination produces a component of high reliability.