The portion of the PSTN that connects any residence or business to the nearest CO is known as the ____.
A) demarcation point
B) NIU (Network Interface Unit)
C) local loop
D) central office

Question

Quizplus · Accepted Answer

The local loop, also known as the subscriber loop, is the portion of the PSTN that connects any residence or business to the nearest CO. It is the physical connection between the subscriber's premises and the telephone company's network. Therefore, option C is the correct choice. Option A, demarcation point, refers to the point at which the responsibility for a telecommunications line changes from the service provider to the customer, and is typically located at the point of entry to the customer's premises. Option B, Network Interface Unit (NIU), is a device that provides the interface between the telephone company's network and the customer's equipment, and is typically installed at the demarcation point. Option D, central office, refers to the building or facility that houses the switching equipment of the local telephone company and serves as the hub for local phone service.

The Portion of the PSTN That Connects Any Residence or Business