其中csIdle状态表示电话处于空闲状态，正等待接入。csWaiting则表示电话处于程序控制下，等待接入，如果有电话打入，程序会自动应答。csConnected则表示有电话打入，处于连接状态，csRecording则用来表示当前处于记录电话留言状态。csDisconnected则表示当前连接挂断了。

程序初始化 -CsIdle which state that the phone is idle, is waiting for access. said in a telephone csWaiting under control and wait for access, if there are calls into, the program will automatically answer. csConnected said into the telephone, at the connection status, csRecording are used to indicate the current status in the record of phone messages. csDisconnected said the current connection hung up. Initialization procedure