What is the main reason for using twisted-pair cabling in telecommunications?

Twisted-pair cabling is predominantly used in telecommunications because it effectively reduces electromagnetic interference (EMI). The twisting of the individual pairs of wires helps to cancel out electromagnetic interference from external sources and reduces crosstalk between adjacent pairs within the cable. This design allows for clearer signal transmission over longer distances, enhancing the overall performance of communication networks.

In environments where numerous electronic devices are present, the reduction of EMI is particularly crucial, as it helps maintain the integrity of the data being transmitted. This makes twisted-pair cabling a reliable choice for both voice and data communication applications. While the other listed factors, such as cost-effectiveness, simplicity of installation, and bandwidth availability, are also important considerations in selecting cabling types, the primary and distinguishing feature of twisted-pair cabling is its ability to minimize EMI. This feature directly impacts the quality and reliability of telecommunications systems, making it a foundational element in network infrastructure.