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Q 有时,Modem已经连通,但用通信软件传输数据时,却显示“联接失败”而无法传送数据。A Modem实际上有两种不同的工作状态,一种是传输数据状态,即Modem将计算机发来的所有信息均当做数据来处理,进行相应的调制处理,转换为模拟信号传送出去,Modem的另一种状态就是命令状态,该状态下,Modem接收计算机发来的AT命令,对Modem的参数作调整。当两端的Modem通上电后,通常它们会自动呼叫而建立联接,此时两台Modem的CD灯变亮,此时启动通信软件进行数据传送,往往会显示“联接失
Q Sometimes the Modem is connected, but when using the communication software to transfer data, it displays ”Connection failed" and can not send data. A Modem actually has two different working states, one is the state of data transmission, that is, Modem sends all the information sent by the computer as data to deal with, the corresponding modulation processing, converted to analog signals sent out, Modem’s other A state is the command state, in this state, the modem receives the AT command sent by the computer to make adjustments to the Modem parameters. When the two ends of the Modem are powered on, they usually automatically call and establish a connection. In this case, the CD lights of the two Modem’s are on. At this time, the communication software is started for data transmission, and the connection failure