The N-MC-BB-R is a surface-mount back box designed for use with DM3000, KAL750, and ZP780 series manual call points. It provides flexible cable entry options from the rear for concealed cable trunking or from the top and bottom for surface-mounted cable trunking. The back box includes conveniently stored mounting screws for compatible manual call points and features a screen connection terminal for reliable cable screen termination in electrically noisy environments.