The Olson Model OTOLS-BIYY-ZZ Bidirectional 1.25Gb/s Single-Mode Small Form Pluggable (SFP) Fiber Optic Transceiver is one of several module options available for the Model OTDV-1250 as well as a number of Olson fiber optic Ethernet transport products. The module is compatible with gigabit Ethernet and 1000BASE-SX. The SFP module may be swapped in the field. The link can be ordered in a variety of wavelengths for varying distances and LC or SC connectors. All models operate over a single 9/125nm single-mode fiber only. These SFP modules do not include DMM monitoring.