而系统管理模块主要实现的是对各个数据表进行添加、编辑、删除等功能操作以及对留言版进行一些相应的回复。
The system management module mainly realizes the functional operation on adding, editing, deleting of all data tables and responses to the message correspondingly.
对讲录音模块主要是实现可视对讲和家庭录音留言以及完成信息的显示功能，二者是通过串口进行通讯的。
The talk and record module realizes the visual talk, home record and information display. The two modules communicate to each other through their serial ports.
后台系统中有订单管理、运输管理、商品管理、管理员管理、新闻管理、用户留言管理六个子模块。
In the background system, there are six modules too, which are orders management, transport management, merchandise management, administrator management, news management.
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