A system and method for ensuring that a digital switching exchange is able to properly collect data on the charges incurred for pay connections by providing a verification of the accuracy of the communications data records generated by the digital switching exchange. A system and method containing at least one test unit that is able to be linked to the digital switching exchange. The test unit includes a device for generating a connection-related reference data record. The digital switching exchange is able to generate at least one connection-related communications data record from transmitted communications elements. The contents of the connection-related reference data record are compared in a system evaluator to the contents of each connection-related communications data record belonging to it.