楼宇对讲系统里用的文字信息接收。用可视对讲话机的TFT屏可看到从管理中心发过来的广播信息和本户的特发信息，采用二键式菜单式查询等功能。-buildings Talkback system that used to receive text messages. Visualization of his machine TFT screen can be seen from the management center sent the information and broadcasting ope