As the use of Internet becomes widespread and the desire for the fast data communication grows more and more, high-speed Internet access services that utilize the existing copper wiring, are rapidly being deployed. The reason is that the copper media, especially Category-3 UTP (CAT3) is ubiquitous, low-cost medium and available for $\frac{10}{100}$Base-T. The CAT3 is very lossy copper medium designed to support low-speed, voice-based communication. Therefore there is no performance guarantees if the data are sent through a copper channel over 100 meters. To transmit data into the distance, for example, many xDSL equipments use numerous high-bit rate digital communication technologies which require auxiliary transceivers. In this paper, we present an analog adaptive equalizer providing robust 10Mbps data transmission up to 500 meters and 100Mbps data transmission up to 100 meters with a novel variable gain method. It directly deals with $\frac{10}{100}$Base-T outputs that most PCs support and doesn’t need any auxiliary transceivers.
