This MSA compliant SFP-OC3-BX-USFP transceiver provides OC-3 (155mbs) transmission rates for up to 20km over single-mode fiber (SMF) at a bidirectional wavelength of 1310nmTx/1550nmRx using an LC connector. This bidirectional unit must be used with another transceiver or network appliance of complimenting wavelengths. It is built to MSA standards and is uniquely serialized and data-traffic and application tested to ensure that they will integrate into your network seamlessly. Digital optical monitoring (DOM) support is also present to allow access to real-time operating parameters. This transceiver is Trade Agreements Act (TAA) compliant. We stand behind the quality of our products and proudly offer a limited lifetime warranty.