Other “Custom-tailored” services
Long Lines and the operating companies also provide extensive private line services—that is, service for customers who have a large enough volume of communications between two or more points to need facilities for their exclusive use, tailored to their individual requirements. The private line services are provided by means of both wire and radio, for a specified period of time and usually on a recurring basis. Many American industries, the press and governmental agencies use these services, which include telephone, teletypewriter, teletypesetter, radio and television network transmission, facsimile and telephotograph.
Teletypewriter service transmits typewritten messages from one point to another, whether the sending and receiving machines are in the same building or across the continent. Teletypesetter service, by means of electrical impulses sent over Bell System circuits, makes it possible to set type for newspaper or other publication use speedily and from a distance. Facsimile service reproduces documents, drawings and maps at the distant end and telephotograph service does the same for pictures.