A telephone exchange is a telephone system located at service centers (central offices) responsible for a small geographic area that provided the switching or interconnection of two or more individual subscriber lines for calls made between them, rather than requiring direct lines between subscriber stations.
A telephone exchange is a telephone system. This telephone system is located at service centers (central offices) responsible for a small geographic area. This telephone system located at service centers (central offices) responsible for a small geographic area provided the switching or interconnection of two or more individual subscriber lines for calls, rather than. This telephone system located at service centers (central offices) responsible for a small geographic area were requiring direct lines between subscriber stations. These calls were made between them.