What is TELEX?
Telex is a dial-up public switched teleprinter network for the transmission and delivery of printed messages between subscribers. It evolved from the Telex Printergram service which was introduced on 15th August 1932. With the necessary additional signalling equipment*, this enabled a telephone subscriber to use a teleprinter no. 7B on his line. This could be used for intercommunication with another telephone subscriber with a teleprinter, or primarily for sending messages (printergrams) to the Central Telegraph Office. * voice frequency convertors. “In setting up the Telex Network, some allowance has been made for the Telegraph Automatic Switching System (TASS) to be absorbed into the Telex System should the decline in the Public Telegraph Service continue to the point where separate networks cannot be justified.” Manual Telex By 1945, it was decided that a dedicated telegraph network separate from the Telephone Service was needed, for the growing use of teleprinters. In 1947 a manual
