The DFE-530TX is an IEEE 802.3 10/100Mbps compliant Fast Ethernet adapter especially designed for PCI bus computers. The DFE-530TX supports both 100Base-TX two-pair category 5 UTP cable and 10Base-T category 3,4,5 UTP cable connection. It also operates with full-duplex, doubling the network speed to 20/200Mbps. ??Utilizing the plug-and-play features, the DFE-530TX adapter is fully auto-configurable for easy installation. 3 on-face LEDs for diagnostics, indicate 10/100Mbps, Link and Activity. Auto detection 10M Ethernet & 100M Fast Ethernet while DFE-530TX with one RJ-45 connector. The DFE-530TX with its PCI 32-bit data bus, can deliver high throughput without the need for on-board memory. The 10/100Mbps MAC controller has sufficient FIFO memory built-in for receive/transmit packet buffering, along with PCI bus mastering, the DFE-530TX can be lower the PCI bus utilization and free the CPU for other bus intensive applications.