Installation of new wiring/cables can incur substantial costs in planning, labor, and system downtime. Under hard-to-wire circumstances, or when budgets are limited, existing copper-wire networks can be a cost-effective alternative to quickly deploy an Ethernet extension. Legacy 2-wire copper networks are everywhere in industrial environments, such as RS-485 twisted-pair cables and voice-grade copper wires. DSL Ethernet extenders can leverage existing copper wires to extend point-to-point industrial Ethernet networks beyond the 100-meter distance limitation and offer high data-rate transmission. In this article, we will discuss the factors which can significantly improve network communication and the methods to ensure a stable, reliable, and efficient DSL Ethernet extender deployment.