The internal frame consists of two sides (left and right), which are an independent base for connection construction. This allows to easily build a complete connection, then the whole be mounted on foundation and eventually the cabinet is placed from the top. The frame is also an excellent base for solutions in the telecommunications and data communications fields. Elements of frame have been designed for installation in cabinets DCE (DIN). They are made of insulating material (glass fiber reinforced polyester). The sides have sockets for square nuts M8. With the special design it is possible to mount a masking plate in the front.