Transmitting messages, e.g. distress messages, involves allocating DTMF series of digits to be stored in an alarm telephone or a telecommunication arrangement of service head offices

摘要

An identification number and a message are filed in a voice memory as a dual-tone multifrequency (DTMF) digit sequence. The DTMF series of digits to be stored in an alarm telephone or a telecommunication arrangement of service coordination centers are then allocated. A transmitter (1) then transmits the DTMF series of digits to a master reception station (2) via a transmission link (4). An Independent claim is also included for a message transmission circuit arrangement.