This type of cabling is a common component used in telephone systems, characterized by having four internal conductors. The conductors, typically made of copper, facilitate the transmission of voice and sometimes data signals. A standard implementation connects a telephone handset to the base unit or wall jack, allowing for voice communication. This connection is generally established via RJ11 connectors at each end of the cable.
These cables are crucial for ensuring reliable telephone service. Historically, they provided the backbone for residential and small office communication networks. The four wires allow for the transmission of two distinct signals, often used for a single phone line and a secondary function, such as powering a light on the phone or supporting a second line. The straightforward design and ease of installation contributed significantly to its widespread adoption.
