622M SFP Optical Transceiver is produced by F-tone through independent research with high stability network communication Optical Transceiver, Transmission rate 622M; Multimode / single mode; 850nm/1310nm/1550nm/CWDM/DWDM;Transmission distance 0~160km;widely used in telecommunications networks, aerospace industry, Aviation, electricity, railways, medical, transportation, communications, and other major areas.