AE-1 - Electrical Coupler

The AE-1 can simulate the electroacoustic parts of a telephone set either as a signal level or as impedance, although the telephone printed boards can be tested without microphone and receiver transducers. It is possible to evaluate the efficiency and the frequency responses of the basic telephone circuits only from an electrical point-of-view.

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FC-4 - 4 Wires to 2 Wires Converter

The device is for converting from 4 to 2 wire circuits with great accuracy and stability. When connected to the telephone line terminals of CS8014, it lets you make electroacoustic measurements on 4 wire devices (or handsets), having separate circuits for the receiving and emitting sections.

The FC-4 includes also a section for eventual electret microphones feeding.