The LevelOne SFP-7331 is a high performance, cost-effective SFP transceiver. It provides up to 155Mbps bi-directional data transfer rate at distances up to 20km on a single fiber core. These bi-directional SFP Transceivers allow data transfer in either direction through a single optical fiber by employing separate wavelengths travelling in either direction.The SFP-7331 transmits using a wavelength of 1550nm and receives using a wavelength of 1310nm. When coupled with the LevelOne SFP-7321 transceiver which transmits at and receives at the opposite rates (1550nm TX and 1310nm RX) you get bi-direction data communication on a single fiber core.- 1550nm FP LD- Data Rate: 125~155Mbps, NRZ- Single +3.3V Power Supply- RoHS Compliant and Lead-free- AC/AC Differential Electrical Interface- Compliant with Multi-Source Agreement(MSA)- Compliant with SFF-8472 Digital Diagnostic Monitoring Interface- Single LC Connector- Compliance with specifications for IEEE802.3ah 100BASE-BX10-U- Compliance with FDDI PMD Standard- Compliance with ATM Standard