Abstract: The apparatus disclosed is for use with conventional automatic dialing telephone equipment and includes a master or central station and a remote, automatically triggered, dialing station. The remote station is triggered by an alarm device of no particular interest to the present invention, such as one to indicate an intruder or a fire. The remote station, once triggered, electronically dials the assigned sequence of numbers by forming the necessary make and break signals for the conventional telephone equipment found at the telephone exchange to connect the remote station to the central station through the telephone system. When the connection is completed, the central station sends a tone pulse to the remote station to verify the completion of the connection. The remote station then transmits data to the central station by spaced tone pulses.