Abstract The document discusses an ADSL (Asymmetric Digital Subscriber Line) line card project for broadband access. ADSL line card is a module installed at ATU-C side (ADSL Transmission Unit, Central), which provides ADSL line interface and PHY (Physical layer) mulitplex function. The document also describes the functional blocks on this card and focuses on the design of two sections: the control FPGA (Field-programmable gate array) and the LVDS (Low Voltage Differential Signaling) serial...