当讨论机设置成双代表机时，需用DCN - DISBDD双代表按钮替换原装的单个话筒按钮。
DCN-DISBDD buttons for dual use discussion Units replace the single microphone button on a discussion unit when used in dual delegate mode.
哈罗德拿起话筒，莫德像在大广场里啄食一样开始拨号，每个被拨动的按钮都发出跟夫人每次拨号订餐时发出的曲调一样。
He held the telephone while Maude pecked at the buttons as if they were large square seeds. Each button made a note that sounded like the song Mrs. Dialed each time she ordered food.
按下红色按钮，绿灯亮时对准话筒报警。
Press red button, wait for green light and speak into the microphone.
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