Dual 1G SFP fiber module operates at 850nm, 1310nm, and 1550nm wavelengths. All SFP transceivers must be used by pairs. For common SFPs, we should connect the two SFPs which have the same wavelength together. 850nm, 1310nm, 1550nm are the common wavelengths of 1G dual fiber modules. This fiber port utilizes a. A Bidi Transceiver, short for bidirectional transceiver, operates by transmitting and receiving data over a single fiber using two distinct wavelengths. Common wavelength of BIDI optical module SFP BIDI:TX1310nm/RX1550nm; TX1550nm/RX1310nm;TX1490nm/RX1550nm; TX1550nm/RX1490nm;TX1310nm/Rx1490nm; TX1490nm/Rx1310nm. The front panel is usually labeled TX and RX, and you cross-connect TX→RX, RX→TX with a duplex patch cord. Use one fiber strand for both directions simultaneously.
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