Phone Module (PHM) (2009-2013): Function: Phone
The phone module (PHM) (16/60) does not have its own menu keypad. It is controlled via the keypad of the climate control module (CCM) (3/112) or via the steering wheel buttons.
The climate control module (CCM) transmits menu navigation signals to the infotainment control module (ICM) (3/281) via the CAN network. The infotainment control module (ICM) then forwards the signals to the phone module (PHM) via the MOST network.
When using the menu via the steering wheel buttons information is transmitted from the steering wheel module (SWM) (3/254) to the infotainment control module (ICM) via LIN communication. The information is then transmitted to the phone module (PHM) via the MOST network.
Menu information is shown on the display on the infotainment control module (ICM). The information is transmitted from the phone module (PHM) to the infotainment control module (ICM) via the MOST network.
When the phone module (PHM) is started, when there are incoming calls or when the carphone is in use, a request is transmitted to the infotainment control module (ICM) to use the display.
Phone calls can be connected either via handsfree or via handset.
For calls via handsfree the microphone and speakers connected to audio module (AUD) (16/105) are used.
Phone module (PHM) sends a request to infotainment module (ICM) to obtain access to speakers and microphone. Infotainment module (ICM) sends a request on to audio module (AUD).
Communication between phone module (PHM), infotainment module (ICM) and audio module (AUD) takes place via MOST-net.