when image information is received , a main controller investigates the blank memory capacity of a floppy disk , after which the main controller executes processing for storing the received image information in an image - information semiconductor memory while confirming that sufficient blank memory remains in the image - information memory . if , during execution of the processing for storing the image information , the blank memory area of the image - information memory runs out so that no further image information can be stored there , or the quantity of image information to be stored in the image - information memory becomes greater than the blank memory capacity of the floppy disk , an error warning is issued , the processing for storing the image information is suspended and processing for interrupting communication is executed .