Telefonkabel

Telefonkabel, also known as telephone wire or telecommunication cable, is a type of cable used to transmit voice and data signals over telephone networks. The most common type of telefonkabel for traditional landline telephones is the twisted pair cable. This cable consists of two insulated copper wires twisted together. The twisting of the wires helps to reduce electromagnetic interference from external sources and crosstalk between adjacent pairs within the same cable.

Early telephone systems primarily used overhead telefonkabel supported by poles, which were susceptible to weather damage and visual clutter. Modern telephone networks have increasingly transitioned to underground telefonkabel, offering greater reliability and aesthetic appeal. Within buildings, smaller gauge telefonkabel connects individual telephones to the main network distribution point.

Beyond traditional voice communication, telefonkabel has also been adapted for data transmission. Technologies like DSL (Digital Subscriber Line) utilize existing copper telefonkabel infrastructure to provide high-speed internet access. While fiber optic cables are now prevalent for high-bandwidth applications and long-distance communication, copper telefonkabel remains a significant part of the global telecommunications infrastructure, particularly for the "last mile" connection to many homes and businesses. The composition and shielding of telefonkabel can vary depending on its intended use and the environment it is installed in.