Call and presence module with connector for handheld calling unit. Standard box, without frame
Call and signalling module with normal and presence call buttons, and LEDs for active presence and call in progress. Type B USB connector for handheld calling unit, with disconnection warning and two contact outputs for light activation. Can be mounted in standard mounting box or for false partition. Supplied without frame. Compatible with the M-420 series or most of the electrical equipment series. Emergency call. OPTIMUS model ref. U-PT.