Most Network

The MOST network can consist of up to 8 different control modules.

The infotainment control module (ICM) deals with monitoring and communication on the MOST network. The infotainment control module (ICM) is in turn monitored by the central electronic module (CEM) on the CAN network.

From the Infotainment Control Module (ICM), only the Integrated Audio Module (IAM) is standard on the MOST network.

The table below lists all the control modules which may be included in the MOST network.

Explanation: 

CAN  = Controller Area Network, electrical network for communication.

MS CAN =  CAN low-speed section.

MOST  = Media Oriented Systems Transport, fiber optic network for communication.

Master control module  = Control module which monitors the MOST network.

Slave control module  = Control module which supplies the MOST network functions.

Option  = Factory installed accessories, during the purchase of a new car.

Accessory  = After market installation.

Control module	Function	Communication	Other
Infotainment control module (ICM)	Monitors the MOST network.	Master control module, connected to both the MS CAN and the MOST network	Included in the standard set-up of the MOST network. Must be connected to the MOST network to function.
Integrated Audio Module (IAM)	Available in two versions; cd-player, cd-changer. Has its own AM/FM aerial.	Slave module on the MOST network.	Included in the standard set-up of the MOST network.
Audio module (AUD)	Amplifier that all loudspeakers are directly connected to when the vehicle is equipped with an audio module (AUD).	Slave module on the MOST network.	Option, accessory.
Digital Audio Broadcast Module (DABM)	Receives digital surface-routed radio signals.	Slave module on the MOST network.	Option, accessory. Applies to markets Europe and rest of the world.
Remote Digital Audio Receiver (RDAR)	Receives digital satellite and terrestrial radio signals.	Slave module on the MOST network.	Option, accessory. Only applies to market USA.
Accessory USB unit (AUU)	Interface between the vehicle's infotainment system and external USB units that support the standard for portable media on USB 1.1 and 2.0.	Slave module on the MOST network.	Option, accessory.
Phone module (PHM)	Controls carphone functions.	Slave module on the MOST network.	Option, accessory. Cannot be installed in the vehicle with the Bluetooth phone module (BPM).
Bluetooth phone module (BPM)	Functions as a wireless link between the vehicle's infotainment system and mobile telephone equipped with Bluetooth technology.	Slave module on the MOST network.	Option, accessory. Cannot be installed in the vehicle with the Phone module (PHM).
Multimedia module (MMM)	Displays traffic information on the High Level Display Front (HLDF). Has integrated traffic message channel (TMC) receiver and global positioning system module (GPS) receiver.	Slave module on the MOST network.	Option, accessory.
Subwoofer module (SUB)	Manages the function for sound reproduction from the Audio module (AUD) to the subwoofers.	Slave module on the MOST network.	Option, accessory. Only V70.