PURPOSE: To call automatically an opposite subscriber to make a speech by connecting one telephone set through one network controller.

CONSTITUTION: Data from a connection computer 28 is received by a serial I/O port 14, and the receive data is sent to a parallel I/O port 20 through a storage circuit 16 under the control of a central processor 12 and transmitted through the network controller 32. Thus, a connector 10 for an automatic calling device calls a called subscriber automatically by the indication of the connection computer to make a telephone call, or sends a message automatically, and then calls the next called subscriber after the telephone call is completed.