The 25G OEO Card operates on the O-E-O principle, serving as an optical signal regeneration converter proficient in 25.5-28.1Gbps signal wavelength conversion, single-mode adaptation, relay amplification, and signal regeneration. Its versatile applications cover the 25G/100G optical communication and transmission domains, spanning Data Networks and C/DWDM scenarios. Featuring rate access from 25.5-28.1Gbps, service access encompassing Ethernet, FC, and more, along with 3R function support, this card efficiently handles 4-channel two-way/4-channel one-way business processing on a single card. Its plug-in design ensures seamless integration, saving space and allowing convenient expansion as needed.