COMMUNICATION TERMINAL DEVICE, DATA COMMUNICATING METHOD AND SYSTEM, PROGRAM AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To perform data communication without using an e-mail service using the Internet and also without being charged with a data communication fee before a received communication service regardless a used communication company. SOLUTION: Number information and data are associated and registered in a data conversion table in a data communication module 104. In the case a terminal device 101 side uses a telephone number notification function and can detect number information included in a communication connection request message with number information from transmitting side communication equipment 103 attached, the module 104 side converts the detected number information into data corresponding to number information coinciding with the detected number information in the conversion table, and also transmits the converted data to the terminal device 101 side. The terminal device 101 displays the transmitted converted data on a displaying part 303.