| 摘要 |
The present invention concerns a communications system (KS) comprising a communications apparatus and a test apparatus (TV) for testing of the communications apparatus, as well as a method for testing of a communications apparatus (KS). The communications apparatus comprises a plurality of telephones (T1 to Tn), a plurality of electrical connection lines, as well as at least a transmission station (UEV) for transmitting signals in the telephone communications system (KS). The test apparatus (TV) comprises a central signal processing apparatus (ZV), which supplies the test instructions, and a converter apparatus (WV) connected with a programmable data processing apparatus (S), which is constructed so as to convert digital test signals generated by the programmable data processing apparatus (S) under the control of the test instructions into operating signals, whereby an interrupt apparatus (UV) connected with the converter apparatus (WV) is constructed so as to interrupt, depending on the operating signals, at least one of the electrical connection lines for a period of time determined by the operating signals, whereby signal changes are produced on the basis of the systematic interruptions in the telephone communications system (KS), which are able to be signaled by comparison with the corresponding reference signal changes.
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