The Olson Model OTOLS-1X12-XX series of 1.25Gb/s Single Mode Small Form Pluggable (SFP) Fiber Optic Transceivers are module options available for the Model OTDV-1250 VAD+E Transport Link as well as a number of Olson fiber optic Ethernet transport products. The SFP module may be swapped in the field. The modules are available at 1310nm, 1550nm or CWDM wavelengths. The transmitters use MQW DFB lasers. The receiver sections use an integrated GaAs detector preamplifier (IDP). The 1310nm transceiver operates up to 30km and the 1550nm and CWDM transceivers operate up to 120km on SM fiber. These SFP modules do not include DMM monitoring. The CWDM modules are also available for 40km and 120km distances. Contact the factory for details.