BK type boxes are used in public telecommunication networks and are intended for installation in distribution cabinets for connection of copper telephone cables. Boxes are equipped with multi-link connectors - plinths. BK type boxes have overall dimensions and mounting seats are the same as boxes with screw couplers BKT-100 × 2. They are intended for the replacement of boxes BKT-100 × 2 in existing cabinets, and for installation in new cabinets SHR.