System Overview: Signals

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The following table summarizes the input signals to and output signals from the phone module (PHM). The signal types are divided into directly connected signals and MOST communication. The illustration below displays the same information with the Volvo component designations.

Input signals	Output signals
Directly connected: Antenna signal, carphone (16/64) Microphone, handset (16/62) SIM card holder (16/1).	Directly connected: (power supply unless otherwise stated) Antenna signal, carphone (16/64) Loudspeaker, handset (16/62).
Via MOST communication:	Via MOST communication:
Infotainment Control Module (ICM) (16/1) Audio control module (AUD) (16/105) microphone sound during hands free usage.	Infotainment Control Module (ICM) (16/1) Audio control module (AUD) (16/105) loudspeaker sound during hands free usage.

Fig 1: Identifying Volvo Component Designations

Courtesy of VOLVO CARS CORPORATION