The point where the telephone company ends and the homeowner's interior wiring begins is called the _________.

The term "demarcation point" refers specifically to the location where the telephone company’s network ends and the customer’s internal wiring begins. This point is significant in telecommunications as it serves as the boundary between the service provider’s equipment and the customer's equipment. It is often where the responsibility for maintenance shifts from the service provider to the homeowner or business owner.

In practical applications, the demarcation point is crucial for ensuring that both parties understand their responsibilities in terms of service and maintenance. This location is also typically marked so that technicians can easily identify it during service calls or when troubleshooting issues. By defining this boundary, it helps to streamline service provision and clarify liability in the event of technical problems.

While other terms or phrases might describe similar concepts in specific contexts, "demarcation point" is the industry-standard term that accurately describes this critical junction between the telephone company’s infrastructure and the interior wiring of a property.