Hello Roger,
The USB Modem which I am using is from Sentar Wireless Technology and the
model number is ST860U. Following is the link for the same.
http://www.sentarwireless.com/rdr/?lang=english&mod=products&fileid=st860u_en.php
On Tue, Feb 3, 2009 at 9:36 PM, Sumeet Chakraborty <
sumeet.chakrabo...@gmail.com> wrote:
> Hello Roger,
>
> First of all my apologies for the delayed response. I went through the
> PSTN120.pdf and I would like to sincerely thank you for providing me such a
> nice document which has cleared my queries. However I am still left with a
> few queries.
>
> 1) How do I recognise which interface corresponds to abstract control
> model? Is there any way to check it.
>
> 2) How to I understand which protocol my device supports, As far as I know
> it supports the AT Command sets.
>
> Please help me on the same. Thanks in advance.
>
>
> On Fri, Jan 30, 2009 at 1:30 AM, Roger Lindsjö <ro...@tilialacus.net>wrote:
>
>> Sumeet Chakraborty wrote:
>>
>>> Hello Roger,
>>> Thanks for providing more insight to my problem. When we look into the
>>> output of the "testlibusb-win32.exe" do we need to look at the key by the
>>> name "*bmAttributes*". In the key bmAttributes key I could see values as
>>> "02h", "03h", so do these values correspond to the values that is mentioned
>>> in section 4.2 of PSTN120.pdf.
>>>
>>> Is the SendEncapsulatedCommand supported with the javax.usb package?
>>>
>> Yes, SendEncapsulatedCommad is just a sequence of bytes posted as a IRP.
>>
>>> what kind of flexibilities does a Abstract Control Model give me?
>>>
>> It seems to allow your device to understand AT commands sent over a
>> specific protocol on top of USB.
>>
>>> Is there any kind of modification I need to do at my code level to send
>>> "AT" commands to the USB Modem?
>>>
>> You probably need something along the lines of:
>>
>> byte[] data = "ATcommand".getBytes("US-ASCII");
>> UsbControlIrp controlIrp = thePipe.createUsbControlIrp((byte)0x21, (byte)0
>> , (short)0, (short)interfaceNum);
>> controlIrp.setData(data);
>> thePipe.synchSubmit(controlIrp);
>>
>>> Please do let me know as to what I need to do to send AT Commands to the
>>> USB modem?
>>>
>> As your modem probably supports CDC, PSTN specifically, you need to read
>> and understand the document I pointed to. You must implement the protocol
>> mandated by the device. Much as you can't just send random bytes over TCP
>> IP, you must know if the other end wants HTTP, FTP, GOPHER etc.
>>
>> //Roger Lindsjö
>>
>>
>
>
> --
> Warmest Regards,
> Sumeet C
>
--
Warmest Regards,
Sumeet C
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