Abstract: A system for transmitting an emergency call from a person requiring assistance. The system includes an emergency calling device coupled via a telephone exchange system to an emergency call receiving center having an operator. The calling device automatically dials a predetermined emergency telephone number upon actuation of a sensor by the person requiring assistance for placing a call to the emergency center. A first data device is provided for transmitting predetermined emergency data by frequency keying in the voice band to the emergency center. An intercommunication set in the calling device establishes a voice connection between the person requiring assistance and the emergency center operator. The intercommunication set is switchable between states of voice transmission and voice reception.