This QSFP-DD dual pluggable EDFA booster amplifier offers a optical input range and provides a +20dB nominal gain to a C-Band DWDM link. com Europe FS EuropeFREE SHIPPING on Orders Over EUR 79 VAT excl. It is configured for Automatic Gain Control (AGC) by default and can be further. The QSFP-DD (Quad Small Form-factor Pluggable – Double Density) form-factor is used for 200G, 400G and 800G applications and is backward compatible with lower speed QSFP+, QSFP28, QSFP56 and QSFP112 technologies. It is designed to be compatible with QSFP-DD MSA on mechanical and electrical interface, which allow it be Plug-and-Play in QSFP-DD cage. Operating Wavelength Range Channel Number Input Power.