Abstract: A testing device and a method for verifying the charge invoicing for a communications device according to time unit intervals is provided. A testing device, which can simulate at least one calling analog terminal and at least one called terminal, is connected to a network node that generates time pulses. At least one predetermined test communications connection is set up and terminated over at least the one network node. Further, the time interval between the beginning of the test communications connection and the generation of a first time pulse is determined and verified to ascertain whether the determined time interval is located within a first predetermined time domain. During the existing test communications connection, time unit intervals of successive time pulses are measured and compared with a predetermined time interval. A further method involving receipt of additional time pulse(s) after the termination of the test communications connection is also provided.

Abstract: A method and system for verifying the connection-related communications data registered by a network node, where the connection-related communications data are used for the calculation of charges includes establishing at least one predetermined test communication connection. By clearing the predetermined test communication connection via the network node and registering a time of an event, the system and method registers the time of at least one additional event for calculating charges at a predetermined measuring point lying outside of the network node. A systematic temporal measuring error is determined. A reference data record containing time-related data and a connection-related communications data record generated is generated. The method corrects the time-related data of the reference data by the ascertained systematic temporal measuring error and compares the reference data record to the connection-related communications data record to determine if a difference lies within a predetermined range.

Abstract: 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.

Abstract: A method and system for verifying the connection-related communications data registered by a network node, where the connection-related communications data are used for the calculation of charges includes establishing at least one predetermined test communication connection. By clearing the predetermined test communication connection via the network node and registering a time of an event, the system and method registers the time of at least one additional event for calculating charges at a predetermined measuring point lying outside of the network node. A systematic temporal measuring error is determined. A reference data record containing time-related data and a connection-related communications data record generated is generated. The method corrects the time-related data of the reference data by the ascertained systematic temporal measuring error and compares the reference data record to the connection-related communications data record to determine if a difference lies within a predetermined range.

Abstract: The invention relates to a testing device and to a method for verifying the charge invoicing for a communications device according to time unit intervals. According to the invention, a testing device, which can simulate at least one calling analog terminal and at least one called terminal, is connected to a network node that generates time pulses. At least one predetermined test communications connection is set up and terminated over at least the one network node (40). In addition, the time interval between the beginning of the test communications connection and the generation of a first time pulse is determined and verified to ascertain whether the determined time interval is located within a first predetermined time domain. During the existing test communications connection, time unit intervals of successive time pulses are measured and compared with a predetermined time interval.

Abstract: Compositions are used for coating teeth and dental prostheses based on a mixture of(a) at least one compound that is soluble in the reaction medium having the formula (I)MR.sub.x (I)in which M means Ti, Zr, Si, Ge, Sn or Al, R means halogen, hydroxy, alkoxy, acyloxy or a chelate ligand, and x means the valency of M, and(b) an organic silane having the formula (II)R".sub.n SiX.sub.4-n (II)in which R" means alkyl, alkenyl, aryl, arylalkyl, alkylaryl, arylalkenyl or alkenylaryl, where said radicals may be interrupted by oxygen or sulfur atoms or --NH-- groups, X means hydrogen, halogen, hydroxy, alkoxy, acyloxy or the group --NR.sub.2 ' (R'=hydrogen and/or alkyl) and n has the value 1, 2 or 3, and/or(c) an organofunctional silane having the formula (III)R.sub.m "(R"'Y).sub.n SiX.sub.