A remote electrical signalling system in which emergency call stations are manually operable to communicate with a home station, and a confirmation signal is automatically transmitted back from the home station when a call signal has been properly received. The call stations each include an electromechanical generator to power both a emergency signal transmitter section and a confirmation signal receiver section. Switch means are provided to direct a limited duration generator output first to the transmitter section and then to the receiver section. Power is recycled back to re-energize the transmitter section if a confirmation signal is not received within a pre-determined period of time.At the home station emergency calls are received and the call station identified. A blocking circuit prevents the recording of an identifying digit or the transmission of a confirmation signal unless the previous digits of the call station identification have been recorded.