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When the discussion machine is set to double representative machine, dcn-disbdd double representative button is needed to replace the original single microphone button. Technical specifications of mechanical indicators installation card in a discussion on the silver-white color (RAL) 9022 order information DCN - DISBDD double representative button (10) for the use of double representative of a new generation of DCN system meeting to discuss device button (10). Dcn-disbdd when the discussion machine is set to double representative machine, it is necessary to replace the original single microphone button with dcn-disbdd double representative button. Technical specifications of mechanical indicators installation card in a discussion on the silver-white color (RAL) 9022 order information DCN - DISBDD double representative button (10) for the use of double representative of a new generation of DCN system meeting to discuss device button (10). Order number DCN - DISBDD