The modular control unit can manage a maximum of 12 interpreter stations allowing translation into 12 languages. The base version of the control unit is equipped with one original channel and 4 foreign language channels. With two additional modules, each with 4 output channels, the system can be extended to 8 or 12 foreign language channels. The interpreter stations are connected with usual standard network cables (CAT.5) or special cables. The SIS control unit is configured via an integrated 5.5" touch-screen or an optional Windows® software.