Product details:

The Netsys HyperXtender ER Ethernet Extender Kit (NV-202EKIT) provides the ultimate Ethernet Extender solution for point-to-point Ethernet connections up to 10,000 feet (3 km) and over existing phone lines or network cable. The kit includes two HyperXtender ER Ethernet Extenders (NV-202E), one configured as the local unit (CO) and one as the remote unit (CPE), and features auto- configuring speeds up to 100Mbps symmetrical (up to 1,000 feet, with speeds dropping off asymmetrically from there), automatically optimized based on the quality of the line and the distance.