The 7707ET is a VistaLINK capable Ethernet Fiber Transceiver that provides an economical method of transmitting two 10BaseT Ethernet channels or one 100Base-TX Ethernet channel over optical fiber. The transceiver is IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX compliant. It mediates between a 10/100BASE-TX segment and supports both full duplex and half-duplex operation. Monitoring of card status and parameters is provided locally at the card edge and remotely via VistaLINK. A pair of 7707ET transceivers permits full duplex communication over single or dual optical fibers. Diagnostic LEDs provide indication of power, link status and data reception.