Getac 9270D Service Manual page 40

1.2.10 RGMII LAN PHY - RTL8111D
The Realtek RTL8111D-GR/RTL811DL-GR Gigabit Ethernet controller combines a triple-speed IEEE 802.3
compliant Media Access Controller (MAC) with a triple-speed Ethernet transceiver, PCI Express bus controller, and
embedded memory. With state-of-the-art DSP technology and mixed-mode signal technology, the
RTL8111D/RTL8111DL offers high-speed transmission over CAT5 UTP cable or CAT3 UTP (10Mbps only) cable.
Functions such as Crossover Detection and Auto-Correction, polarity correction, adaptive equalization, cross-talk
cancellation, echo cancellation, timing recovery, and error correction are implemented to provide robust
transmission and reception capability at high speeds.
The RTL8111D-GR/RTL811DL supports Receive Side Scaling (RSS) to hash incoming TCP connections and load-
balance received data processing across multiple CPUs. RSS improves the number of transactions per second and
number of connections per second, for increased network throughput.
The device also features inter-connect PCI Express technology. PCI Express is a high-bandwidth, low pin count,
serial, interconnect technology that offers significant improvements in performance over conventional PCI and also
maintains software compatibility with existing PCI infrastructure. The device embeds an adaptive equalizer in the
PCIe PHY for ease of system integration and excellent link quality. The equalizer enables the length of the PCB
traces to reach 40 inches.Other Functions