Testing device for monitoring the data channel during data interchange between central processors in microprocessor-controlled telephone switching systems

摘要

The invention relates to a testing device for monitoring the data channel during data interchange between central processors in microprocessor-controlled telephone switching systems. The testing device (HDLC-MOT) has a clock counting stage device (TZS1, 2) and a data counting stage device DZS1, 2), which are in connection with the signal converting device (SU) in such a way that, by means of an error logic circuit (FLS), data sequences with different data patterns can be displayed optically by signal indicators (FE, DA, LL) displaying operating states. Such testing devices are used for monitoring data channels in microprocessor-controlled telephone switching systems. <IMAGE>