Verfahren zur Fehlerisolierung in Kommunikationseinrichtungen durch Zurückschleifen-Tester

摘要

A method and apparatus for testing of a unit under test (50) by a communication system tester performs loopback tests. During these loopback tests, data transmitted by the unit under test may be stored (21) and sent back to the unit under test. In addition, user defined prestored data (22) may be transmitted to the unit under test. Further, prestored messages (24) and tones (23) may be stored by the communication system tester and transmitted to the unit under test for display on a speaker. An operator (52) may review the output of the speaker and determine whether the test has been properly passed. As a result, the operator may determine whether a fault exits in the receiver or transmitter of the unit under test.