Melbus us the communication system that is installed in many Volvo vehicles. (It has now been replaced by the MOST system) It is used to integrate the radio, RTI systems and any other peripherals into one friendly system. Melbus devices can be chained together, so it is possible to integrate several devices in one vehicle. This is accomplished through the use of Melbus splitter and chain cables. All of our multimedia adaptors use the Melbus system.