RATE INFORMING METHOD, SYSTEM THEREFOR AND RECORDING MEDIUM WHEREIN PROCESSING PROGRAM IS RECORDED

摘要

PROBLEM TO BE SOLVED: To provide technology for efficiently and economically using communication service. SOLUTION: A rate informing method for informing the rate of used communication service is provided with a step for obtaining charging calculation information on communication service from a calling source to a calling destination when a call is made, a step for calculating the progress situation of charging from the use course of communication service and obtained charging calculation information and a step for informing the calculated progress state of charging.