System Overview: Signals

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, MOST and CAN communication. The illustration below (see Fig 1) displays the same information with the Volvo component designations.

Input signals	Output signals
Directly connected:	Directly connected: (power supply unless otherwise stated)
SIM card holder (16/140) Antenna signal, carphone (16/47) GPS-signal, telephone (16/47) (only for Volvo on Call when GPS-position cannot be received from any other control module) Microphone, handset (16/62) Hook, handset (16/62) Switch for Volvo On Call including reserve microphone (only for Volvo On Call) (3/267) Collision output signal from the supplemental restraint system module (SRS) (4/9) (applies only to phone modules (PHM) with Volvo On Call).	Antenna signal, carphone (16/47) GPS-signal, telephone (16/47) (only for Volvo on Call when GPS-position cannot be received from any other control module) Loudspeaker, handset (16/62) Reserve speaker (only for Volvo On Call).
Via Controller Area Network (CAN) communication:	Via Controller Area Network (CAN) communication:
Central electronic module (CEM) (4/56) Supplemental restraint system module (SRS) (4/9) Driver door module (DDM) (3/126) Passenger door module (PDM) (3/127) Climate Control Module (CCM) (3/112) Brake control module (BCM) (4/16) Driver information module (DIM) (5/1)	Central electronic module (CEM) (4/56) Driver information module (DIM) (5/1)
Via MOST communication:	Via MOST communication:
Infotainment control module (ICM) (3/281) Multimedia module (MMM) (16/108) (Integrated GPS receiver for vehicle position - only for phone module (PHM) with Volvo On Call) Integrated audio module (AUD) (16/105) (microphone for handsfree)	Infotainment control module (ICM) (3/281) Audio control module (AUD) (speaker sound during hands free usage) (16/105).

Fig 1: Identifying PHM & Components

Courtesy of VOLVO CARS CORPORATION