modulated by the modem 8 and transmitted to the internet fax apparatus 2 via the telephone network 3 first initial identification is performed in accordance with the t 30 protocol of itu t when this initial identification is complete the cpu 5 executes the control software programs to encode the image data and transmit the encoded data to the internet fax apparatus 2 in the internet fax apparatus 2 the received image data is transferred to the printer and printed out upon receiving a confirmation signal from the internet fax apparatus 2 the internet fax apparatus 1 completes the g3 fax mode next a summary of transmission and reception of an image file in the internet fax mode will be described below in the embodiments transmission of e mail is taken as an example an operator sets an original on the scanner 6 of the internet fax apparatus 1 on the transmitting side and presses a one touch button of the operation unit 13 consequently destination data is read out from the ram 12 in accordance with the destination designated by the operation unit 13 if the internet fax mode is designated an internet address is read out from the ram 12 also the scanner 6 of the internet fax apparatus 1 reads an image and the cpu 5 executes the control software programs to convert the image into image data the cpu 5 further executes the control software programs to convert the image data into a tiff file as an attached.