The TSFP-NBx-120 optical transceiver module is a tunable SFP designed for 1G Ethernet applications. Power Consumption CLASS 1 LASER PRODUCT, IEC/EN 60825-1:2014 Do not look into the ends of the fiber optic cable or SFP module while converters are. The TSFP1G-100 (I) transceiver supports 1G Ethernet over single-mode fiber with a reach of 100+ kilometers using tunable DWDM technology in the C-band, available in an I-temp variant with built-in DDM. Therefore, it is sometimes called 1G SFP or GE SFP module. As a direct manufacturer, Wolontek provides cost-effective, industrial-grade SFP transceivers that fully comply with MSA. Full Spectral Coverage: This 1G tunable solution is a two-part offering that covers a broad range of 40 channels across the C-Band, specifically ITU channels 21 through 60. Wavelength Reliability: Our design ensures wavelength control is maintained within ±0.