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How to get the dial number from GSM module

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raychenchina

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I am engaged in a remote controll system, which get the instruction from the dial number.
For example: A dials B, and B picks the phone, then A dials "1", how can B get the "1" ? Is there an AT instruction to get the number information from the GSM module?
Thanks!
 

altough gsm modems were capable to send DTMF tones, i don't know how they can capture the incoming ones !!!!


Accordly to GSM standard, there is a command to send DTMF tones but it works only in audio mode and only works in one-way, i mean sending tones, unfortunetly there is no AT command to capture that tone !

so i suggest use some type of external controller to make that job !

Generating DTMF tones
Code: 
AT+VTS=X
Where X can be: (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, #, *)

** Cheers **
 

Thank you very much!
I thank I need a decoder to get the tone information.

Added after 9 minutes:


Now may I sum the answers, the GSM module can only receive tone information.
I need a separate DTMF decoder.

In the telephone bank, when you dial the bank service number, the terminal will answer and let you press some number to select different service. I wonder how they identify the number customer dials, with a DTMF decoder?
 

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