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.
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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