如何使用USB 3G调制解调器的通信？ [英] How to communicate with USB 3G modem?
问题描述
我有我想从我的应用程序（在Windows XP SP3上运行的C＃.NET 4.0）发送AT的命令到D-Link的DWM-156 3G USB调制解调器。
I have a D-Link DWM-156 3G USB modem that I want to send AT-commands to from my application (C# .NET 4.0 running on Windows XP SP3).
插件并安装驱动程序后，调制解调器显示出来是这样的：
After plug-in and installation of drivers the modem shows up like this:
在设备管理器的，添加了两个串口
- 的D-Link HSPADataCard诊断接口（COM4）
- 的D-Link HSPADataCard NMEA设备（COM5）
- D-Link HSPADataCard Diagnostics Interface (COM4)
- D-Link HSPADataCard NMEA Device (COM5)
在控制面板，电话和调制解调器选项的，一个新的调制解调器添加：
In Control Panel, Phone and Modem Options, a new modem is added:
- 的D-Link HSPADataCard专有USB调制解调器（附COM19）
- D-Link HSPADataCard Proprietary USB Modem (attached to COM19)
问：我应该使用哪个COM端口AT发送 - 命令，在这速度？
我曾尝试以不同的速度全部三个端口，但没有运气任何责任。
I have tried all three ports at different speeds, but with no luck whatsoever.
为了学习，然后我装的免费串行端口监视器的嗅探器的应用程序，希望能够监视用它打开和关闭网络连接（其中工程OK）D-Link的ustility通信。
In order to learn, I then installed the "Free Serial Port Monitor" sniffer app, hoping to be able to monitor the communication with the D-Link ustility as it opens and closes the internet connection (which works OK).
在启动时，嗅探器的应用程序问我来监控和端口我提供以下端口名称可供选择：
On start, the sniffer app asks me which port to monitor and offers me the following port names to choose from:
- 杰尔系统HDA调制解调器，
- D-Link的HSPADataCard专有USB调制解调器，
- COM3，
- COM4，
- COM5
- ...还有几个，包括COM19。
- "Agere Systems HDA Modem",
- "D-Link HSPADataCard Proprietary USB Modem",
- "COM3",
- "COM4",
- "COM5"
- ...and several more, including "COM19".
选择的D-Link的......的名工作好了，现在我可以观看所有，因为它们发生命令所使用的AT，但我不能确定端口用于在该波特率。此外，无论是COM4，COM5或COM19工程嗅探这种方式（似乎没有任何发生在这些端口）。
Choosing the "D-Link..." name works OK, now I can watch all the AT commands being used as they happen, but I cannot determine at which baud rate the port is used. Further, neither COM4, COM5 or COM19 works for sniffing this way (nothing seems to happen on those ports).
现在我想使用的的SerialPort 的在.NET类打开的D-Link的......的端口，并与USB调制解调器说话，但的的SerialPort 的类要求的端口名启动与COM，否则会抛出异常。但没有普通的COM端口的工作。我仍然不知道该使用哪个波特率。我几乎困惑，并锁定在这里 - 我还能有什么办法去这条底线
Now I would like to use the SerialPort class in .NET to open the "D-Link..." port and talk with the USB modem, but the SerialPort class requires the port name to start with "COM", otherwise an exception is thrown. But none of the ordinary COM-ports work. And I still don't know which baud rate to use. I'm pretty much confused and locked up here - what could I do to get to the bottom of this?
推荐答案
好乡亲，谢谢你所有的想法和你的输入。我已经做了一些调查研究，最后我才明白，那为了做什么，我想我没有带串口和AT-命令不惜一切打扰。所有的需要，这是做了一些Windows RAS调用。
Ok folks, thank you for all your thoughts and your input. I have done some more research, and finally i realized, that in order to do what i wanted i did not have to bother with serial ports and AT-commands at all. All that was needed was to do a few Windows RAS calls.
如果我刚刚被更具体一点在我的问题关于什么，我想用我的AT-做！命令，你一定会告诉我的RAS很久以前
If I had just been a bit more specific in my question about what I wanted to do with my AT-commands, you would surely have told me about RAS long time ago!
我找到了一个不错的.Net DLL（的 DotRas ），它包装机Windows RAS从托管代码中使用，而且它似乎做正是我需要（拨号从代码的3G调制解调器连接，与任何类型的3G调制解调器附上）。
I found a nice .Net DLL (DotRas) that wraps native Windows RAS for use from managed code, and it seems to do just what I need (dial a 3G modem connection from code, with any type of 3G modem I attach).
再次感谢您的时间。
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