IE 3008 is an additional board for DXT 3000 that extends system’s capability and functionalities allowing the connection of a maximum of 8 units, in a MASTER / SLAVE configuration. It shall be installed in a dedicated slot inside the cabinet of each unit, that provide the 24V DC voltage necessary for its functioning. System units, each one with a fixed ID, communicates through a fully redundant bus, transporting commands over RS485 and two audio channels (Euroblock connectors). 4 BM 3804 (or BM 3804FM), interlocked on a single chain, can be connected to the MASTER unit, for the activation of both pre-recorded and live messages on each system’s zone, using dedicated BE 3806. The first console is powered directly from the MASTER unit, without need of an additional power supply. At system level, BGM can be injected in the master unit in the dedicated input, with global MUTE facility. At local level, BGM can be enabled on each unit using the specific hardware setting.