Terminating a voice call via AT Command

arduino gsm at-command
BLL27 picture BLL27 · Feb 7, 2013 · Viewed 9.4k times · Source

Im working on a hobby project involving an Arduino and TC35 GSM Module, all is going well really but I am wondering is there an AT Command to terminate a voice call (ATD+phone number;) as I cannot seem to find one in any of the literature I've searched through.

Thanks, Dave

Answer

hlovdal picture hlovdal · Mar 30, 2013

While the "classic" command ATH (there is no need to give a numerical argument to ATH) is applicable for disconnecting calls, notice that it might be configured to do nothing by AT+CVHU=1 (ignore DTR pin and ATH) for other phones (TC35 seems to not support AT+CVHU).

There is the AT+CHUP command that always will hang up the current call, independently of ATH behaviour configuration.

The 27.007 standard also defines an AT+CHCCS (Hangup of current calls) command that can be used to disconnect calls. Also AT+CHLD might be used to disconnect calls.

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