The 10Base-FL Single/Multi-Mode Transceiver converts signals from Thick Ethernet adapter card to a suitable format for transmission over fiber optic cable for up to 20 km (Single-mode) and 2 km (Multi-Mode). This transceiver allows easy connection to a workstation or any devices that need the conversion. It comes with a set switch for enabling and disabling of the SQE function for applications that require the SQE test. In addition, it comes with The POWER, LMON, COL, JAB, XMT AND RCV LED lights that simplify troubleshooting and network maintenance.