Question

我有一个支持语音的56K传真调制解调器，应该支持全双工。我需要打电话，我可以播放声音（输出），还可以接收声音（输入）。

程序： - 我

nitializing modem
      AtQ0         ' Enables modem to send result codes to the DTE. 
      AT+GCI=B5    ' set country of installation to XX
      AT-STE=7     ' to be able to get busy , line in use messages
      AT+FCLASS=8  ' set mode to voice mode
      AT+VSM=130   ' set received audio format
 -- Dialing phone number
     ATD123456;   ' to dial number 123456
 -- WHAT IS NEXT 
 ??? I do assume that i have to read the data signals using VTR , but it gives me error since the modem is not into connect mode. If I used AT+VLS=1 , it will work well to get the audio data from line, but I can not then dial number (ATD1123456;)

问题： - 启动电话和记录数据的正常逻辑是什么。 - 然后我应该读取和写入相同的COM端口，因为此调制解调器应支持全双工。，还是要使用两个不同的COM端口？

是否可以使用普通传真调制解调器进行语音呼叫？

0 个答案: