PURPOSE: To simplify operator's operation by switching the mode to the telephone mode in the case that a call signal of facsimile communication or a reception request signal of data communication is not detected over a prescribed time after line connection.

CONSTITUTION: With respect to the composite terminal equipment provided with the facsimile communication function, the data communication function, and the telephone function, a facsimile modem 1 and a data modem 2 are connected to a control part 3 and a network control part 4, and the facsimile MODEM 1 and the data modem 2 are connected to a line through a mode switching relay 42 of the network control part 4. When the ringing signal from the line is detected by a ringing detecting circuit 43, a mode switching part 31 switches the mode relay 42 to the side of the facsimile modem 1 and the switching data modem 2. If the call signal of facsimile communication or the reception request signal of data communication is not sent though the prescribed time elapses, a timer 32 of the control part 3 is operated to switch the mode switching part 31 to the telephone mode, and the mode switching relay 42 is switched to the side of an initially set telephone set 5.