A method and telecommunication system is disclosed for transmission of a message from a first telecommunication terminal to a second telecommunication terminal, of which at least one is connected to a line-connected telephone network. The message is converted as a short message into the short message format, a connection setup is realized and the short message is transmitted in the short message format to a short message service center and from the latter to the second telecommunication terminal, where the transmission of the short message to the short message center and/or to the second telecommunication terminal is carried out by means of DTMF or FSK off-hook signaling in the voice band.