Telephone Exchange Boxes Casing

Telephone Exchange Boxes Casing

Telephone exchanges have been around since the dawn of telephone communication. Up until the 1960s, they were operated manually, with people employed specifically to connect one line to another on a manual switchboard. These days, however, all exchanges happen digitally. Back at the exchange, calls were connected by an operator using a cord with a plug at each end. As a caller rang in, a small metal plate ("shutter" ) would drop, revealing the caller's number. The operator would take one end of a cord and plug it into a socket (jack) corresponding to their number.

A telephone exchange is a telephone system for a small geographic area that provides the switching (interconnection) of subscriber lines for calls made between them. Telephone exchanges replaced small telephone systems that connected its users with direct lines between each and every subscriber station. In telephony, the local loop (also referred to as the local tail, subscriber line, or in the aggregate as the last mile) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the common carrier or telecommunications service provider's network.