Phoenix Contact, established in 1981 and headquartered in Germany, operates within the manufacturing sector, specifically focusing on electronics. The company employs over 10,000 individuals and reported significant revenue, reflecting its substantial presence in the industry. Phoenix Contact specializes in developing innovative solutions for industrial automation, including technologies that enhance building automation systems. A recent white paper published by the company examines the application of Single Pair Ethernet (SPE) technology in existing building infrastructures. This document explores the feasibility of reusing existing cabling for SPE to minimize the ecological footprint of buildings throughout their life cycle. It discusses the performance characteristics of various cable types, measurement methods, and the implications of using existing data lines for sustainable communication solutions. The findings suggest that leveraging existing cabling can be a practical approach when wireless communication is not viable. Overall, Phoenix Contact's expertise lies in providing advanced electronic solutions that support efficient and sustainable manufacturing and automation processes.