dialing in AT command ?

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hi guys ,

i just did to call the number by using AT commands.But afer the dial , i cant disconnect the line..do you know any solution for the problem i explained you ?

thanks for your help in advance

Posted 4-Feb-13 11:32am

beratxt

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Sergey Alexandrovich Kryukov 4-Feb-13 17:35pm

How about a code sample? Use "Improve question".
—SA

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Michiel du Toit · Answer 1 · 2013-02-06T01:54:00

Solution 1

First of - for lots of details Google "Hayes AT commands" - the first few results will give you plenty of info on what is possible and how to do it.

You hang up calls with ATH. If you are in a binary transmission mode you have to use +++ followed by a 1 sec pause to exit data mode and then use ATH to terminate the call.

Depending on what modem/service you are using there are many variations to take into consideration - many modems support dropping the call by setting the DTR flag on the port, some enter/exit binary mode with a flag instead of/in addition to the AT command. Simply closing your connection to the COM port drops the call with many modem drivers too.

Posted 6-Feb-13 1:54am

Michiel du Toit

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Ankur^\m/ 6-Feb-13 8:04am

Fantastic... 5!

beratxt 6-Feb-13 12:47pm

When İ use Mobile Parnter program , it works and calls ! So device is appropriate for calling..

how will i use ATH command ? can u give any information in C# ? Console.WriteLine("ATH") ?

When i close the port connection . IT DOESNT DROPS TO CALL..EVEN IF I TAKE OFF THE USB MODEM FROM PORT...DOESNT EFFECT..IT CALLS UNTİL SOMEONE ONE OPENS THE TELEPHONE..

AND I AM ABLE TO CALL .. BUT HOW TO TALK ON THE PHONE ? I CANT SEND MY VOICE TO THE PERSON OPENIN TELEPHONE..HOW TO DO IT ?

THANKS FOR NOW

Michiel du Toit 8-Feb-13 3:04am

You're going to have to provide more details about how you're making the calls to get more help. Are you dialing with a physical modem or using an internet service (and which)? Is the modem on the box running the code or on a different box and what make and model is it? Are you talking to the modem via a COM port or, via a USB interface or via a specialized modem driver?

beratxt 11-Feb-13 9:53am

Hi ,

The modem ive used is 3G Modem which is usable for Voice.Neither nor web service is used.Im usıng COM PORT via USB 3G MODEM...

Michiel du Toit 12-Feb-13 3:32am

If you're using a COM port you just write ATH\r\n to the COM port using a Write command to hang up (the same way you would dial using ATD<number>\r\n.

For voice comms I'd recommend looking into TAPI.