ELECTRONIC CENTRAL OFFICE AND TEST UNIT FOR INSPECTING AN ELECTRONIC CENTRAL OFFICE

摘要

The invention relates to a hardware sensor for detecting an inquiry signal for establishing a data link. The provision of said hardware sensor allows for a simple and inexpensive design of the detection function. The invention also relates to a test unit that is provided with a signal generator that is capable of generating inquiry signals for establishing a data link. The provision of the test unit allows for a simple inspection of the hardware sensor.