What is the term used to describe the physical connection between an individual telephone and the telephone company’s CO switch?

The term that refers to the physical connection between an individual telephone and the telephone company’s central office switch is known as the local loop. This connection encompasses the transmission lines that directly link a customer’s premises to the telecommunications provider's network.

The local loop is critical because it is the primary pathway for voice and data communications. It allows the customer to communicate with the broader telephone network and enables access to various services offered by the telecom provider.

Other choices provided might reference different components or technologies: for instance, a central office link does not specifically denote the individual connection to a premise but rather suggests a broader connection within the network infrastructure. A subloop interface typically refers to a sub-section of the local loop potentially used in certain network architectures. Digital subscriber line (DSL) relates specifically to a technology that allows higher speed data transmission over the local loop but is not the term for the physical connection itself.