Making calls from usb modem

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Hello everyone. I have a question for you.
I have a usb modem Huawei E1550.
I want to make C# .NET program, that can make calls and send sms through this modem.
Found this article about sending sms. But I need more information about calls and sms.

Posted 28-Apr-11 23:58pm

4x2bit

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Olivier Levrey 29-Apr-11 6:26am

Try to post your question directly at the article's page. The author will probably answer your question.

Mohamed74 17-Sep-12 21:35pm

I want to send a Balance to another Mobile using C#

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1234anand · Answer 1 · 2013-06-24T03:04:00

Solution 3

atd1234567890;
ATD<mob>
IS USED FOR dialing in huwaei modem

and at+chup is used to disconcect the code

i am working on it but could not success in voice tranfer

Posted 24-Jun-13 3:04am

1234anand

Comments

CHill60 24-Jun-13 12:03pm

You do realise that this question had a solution posted over 2 years ago.

Morash 7-Aug-13 13:39pm

Hello,
Can you please guide as to where the solution to the question is posted

Thanx in advance

Kim Togo · Answer 2 · 2011-04-29T00:54:00

Solution 2

After a litte search on codeproject I found these:
Send and Read SMS through a GSM Modem using AT Commands[^]

Introduction to AT commands and its uses[^]

Here is a article on Huawei modem.
3G Modem Internet Dialer[^]

CP Search on modem at command[^]

---

Generaly, you can access your Huawei E1550 via COM port - SerialPort Class[^].
Then you can control SMS and Calls via AT commands.

ATA - Answer a call.
ATDT - Dial a number
ATH - For hangup.

AT+CMGL=ALL - For listing all SMS mesage storage.
AT+CMGS - For sending SMS message.

Posted 29-Apr-11 0:54am

Kim Togo

Updated 29-Apr-11 9:20am

v2

Comments

4x2bit 29-Apr-11 8:57am

Do you have example project with source code?

Kim Togo 29-Apr-11 9:20am

No, have you tried to search on codeproject or google ?

4x2bit 29-Apr-11 11:08am

I've searched on google and codeproject, but still can't find any examples of making calls using AT commands. If you have it or know where I can look at any example, let me know.

Kim Togo 29-Apr-11 15:20pm

See my updated solution.

4x2bit 6-May-11 3:10am

Maybe you don't understand what I want.
I want to make program, that won't be only sms sender and receiver, it also must be a dialer.

Kim Togo 6-May-11 3:47am

Yes I understand what you want. For dialing you have to use the AT commando "ATDT". Use "Hyperterminal" or "PuTTY" program to open a connection to COM port where the USB modem is attached and play around with AT commands.

4x2bit 6-May-11 5:36am

But I don't understand how to get sound from com port.

Kim Togo 6-May-11 5:46am

You can not get sound from a com port. When you install the Huawei E1550 into USB, there must be a sound device under Windows, where the audio can be transmitted or perhaps there is a mini-jack connector on the Huawei E1550 ?

Kim Togo 6-May-11 6:16am

Those Huawei E1550 support voice, like a mobile phone?

4x2bit 8-May-11 4:34am

Yes, it supports voice, because there is a program with dialer from Huawei.

Kim Togo 9-May-11 3:06am

Good. How does this program handles users voice input ?

4x2bit 9-May-11 9:14am

Voice input is microphone, which connected to my pc.

Kim Togo 9-May-11 9:29am

Okay. Then you must be able to see the device in "System Device Manager" for Windows.
I am afraid I can not help you further. I have not such a modem I can use to test with.

Morash 7-Aug-13 13:51pm

I believe this post is old so there must be solution available, hence code available to make and receive calls with sms support for a usb 3g modem dongle. I have been looking for one for a long time and in vain, is there anyone out there with a voice of hope. Appreciate your prayers

Kim Togo 8-Aug-13 2:25am

Yes, this is an old post.
But generally, you use "AT" command to control the usb 3g modem, and voice has to transferred in an other way. "AT" command is used via Serial Port (COM).
But perhaps the manufacturer of the usb 3g modem has som SDK you can use ?