 The Telex input method is based on a set of rules for transmitting accented Vietnamese text over telex () first used in Vietnam during the 1920s and 1930s.Telex services at the time ran over infrastructure that was designed overseas to handle only a basic Latin alphabet, so a message reading "" ("the dam broke") could easily be misinterpreted as "" ("the wife is giving birth")., a prominent journalist and translator, is credited with devising the original set of rules for telex systems.