A facsimile apparatus fully effectively utilizes a specific communication
function in accordance with a transmission speed. A communication circuit
controls the determination of a communication mode to determine a
communication mode with a destination station and controls a reception
operation and a transmission operation. The control of the determination
of the communication mode includes a first control, a second control, a
third control and a fourth control. In the first control, a communication
mode with the destination station is determined based on registered
information in a transmission speed dependent ECM registration circuit.