第三个功能呼叫服务员功能。总台有一套接收装置，可以带10个转盘。
The third one is waiter calling function, with a receiving set at the master station capable of bearing 10 turnplates.
第三天晚上这个男人走进酒吧对服务员说，“给我来一杯，我请酒吧里所有的人都喝杯啤酒。”
One evening later the man walks again into the bar and says to the bartender, Beer for me, and beer for everyone who is now in the bar.
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