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Main unit

Main unit


General

The main unit for the telephone system is the audio system main unit. It is connected to the wiring harness and the bus via a 26-pin connector.

The main unit performs the following tasks:


Disconnects the normal sound from the selected source during a telephone call. This is achieved by sending a mute signal to the main unit, which then disconnects the normal sound to the speakers and the signal to the external amplifier where relevant.

Receives the audio signal (line input) from the telephone (incoming sound) via the telephone contact and reproduces it via the audio system speakers.


See Test readings, control module connections