One carries voice signals, traditionally analog, over a limited bandwidth connection, primarily designed for telephone communication. The other transmits digital data at significantly higher speeds, facilitating internet access and network connectivity for computers and other devices. A key differentiator lies in their physical connectors; the former typically utilizes an RJ11 connector, while the latter employs an RJ45 connector, which is larger and contains more wires.
The distinction is vital because each cable serves a specific purpose. Utilizing the wrong cable can lead to ineffective or non-existent communication. Historically, phone lines were the dominant form of external communication, but the advent of the internet and the increasing demand for data transfer have made the latter an essential component of modern networking infrastructure. Choosing the appropriate cable ensures optimal performance and functionality for its intended application.