Facsimile transmission control system

A facsimile transmission control system, comprising:

• a transmitting side facsimile device and a receiving side facsimile device coupled to said transmitting side facsimile device, said transmitting side facsimile device comprising:
• means for transmitting a calling signal for calling said receiving side facsimile device;
• detection means for detecting a predetermined multi-frequency control code signal from said receiving side facsimile device;
• selection means for selecting a first mode or a second mode in dependence on detection by said detection means within a predetermined period of time;
• first mode transmitting means for transmitting to said receiving side facsimile device, at a first transmitting speed, a transmitting function signal and image data when the first mode is selected by said selection means;
• and
• second mode transmitting means for transmitting to said receiving side facsimile device, in succession at a second transmitting speed higher than the first transmitting speed, a multi-frequency control code signal indicating a transmitting function and the image data when the second mode is selected by said selection means.