Method of usage-dependent determination of costs in making communication lines

A process for usage-dependent determination of costs after making communication links between at least three communication facilities (12), said at least three communication facilities (12) being connected to each other by a plurality of usage-independent fixed lines (14) for the communication links, said process comprising:

• a) assigning a respective code number to each of said communication facilities to identify each of said communication facilities;
• b) transmitting said code numbers of all of said communications facilities connected with each other when each of said communication links is made to an originating one of said communications facilities;
• c) assigning a respective link logical record to each of the communication links made between the at least three communication facilities (12), said link logical record including user information including initiating user, connected user and link duration and path information defining said communication link to which said respective link logical record is assigned, said path information including said code numbers indicating which of said communication facilities (12) are connected with each other;
• d) evaluating said link logical records in said originating communication facility to determine an amount of usage by said users in order to make a usage-dependent determination of communication costs of said users;
• and
• e) after evaluating according to step d), modifying said communication costs of said users according to said amount of said usage.