The crowd could use the call button on the panel if they meet the emergency, realize the help and alarm. Support the intercom between the Monitoring center and reference point.

• 遇有突发情况，群众可就近使用安装在监控点的对讲面板呼叫键，实现求助和报警。支持监控中心与监控点的全双工语音免提通话；