Voice over IP Intercom Linux 环境下，带有回声消除模块，VC++开发。-The application can: dial an intercom partner via short-dial buttons transport your voice over IPv4 with RTP UDP unicast data packets make a telephone conference support wideband (16kH

主要是qt编程，其中有软键盘功能，有可视对讲的一部分功能-Mainly qt programming, with soft keyboard functions, a part of the visual intercom function

楼宇对讲：视频监控，语音对讲，铃声，和炫铃，向管理处报警，开锁，紧急求助，防区报警等-Building intercom, video monitoring, voice intercom, the bell, and ringback tone, report to management office, the lock, emergency help, defence alarm, etc