Prepaid communication control system and method with restricted access

摘要

A first communication control system (10) comprising a balance database (18) for storing the prepaid money of each caller (12) per caller number, a charge database (20) for storing the charge system of each communication company, a balance checking part (26) for checking the balance by searching the balance database (20) with the caller number, a call permission determining part (28) for determining the permission of a call of the caller based on the balance, a communication company specifying part (29) for specifying one communication company (A) based on the input number from a caller terminal (13), a line switch (16) and a line control part (24) for connecting the caller terminal (13) with a called terminal (32) through an exchange (±) of the specified communication company (A), a speech time measuring part (34) for measuring the speech time, a telephone charge calculating part (36) for calculating the speech time and the telephone charge according to the charge system of the communication company (A), and a balance updating part (38) for subtracting the telephone charge from the balance of the caller (12).