SFP56-DD (Small Form Factor Pluggable 56 Double Density) is a high-speed optical transceiver module used in data communication networks. It is designed to support 100 Gigabit Ethernet (100GbE) data rates and is backward compatible with previous generations of SFP modules such as SFP, SFP+, and QSFP. This portfolio includes DR1, FR1, LR1, CWDM LR1, and etc. All 100G transceivers comply with the QSFP28 MSA, CE, FCC, Reach, and RoHS standards.