Abstract: A teleprinter has a printer for printing received or manually entered characters in a row-by-row fashion. The characters of a row are initially stored, and only following the occurrence of a predetermined control signal, for example a "carriage return" signal, are all of the characters of the pending row printed. The teleprinter has a display unit for displaying at least a portion of those characters of a row which have not yet been printed. The display unit may also display at least one preceding and at least one following row in addition to the row being printed.

Abstract: An arrangement for synchronizing one or more input/output devices in teleprinters in the context of a subdivision, necessitated by the use of a five-bit code (CCITT 2) for communications transmission purposes, of the total quantity of characters into letters/figures levels employs a storage device in which the level relationship (letters and figure levels) of the character last transmitted or received is stored. A comparator connected to the storage device compares the level relationship of the stored character with that of a character ready for transmission and in the event of disparity operates, via a logic arrangement, to effect the introduction of a level-related switching symbol.