my customer wants to open a door just pressing a Speed Dial, pressing the code on the phone panel already works. I know on old versions was not possible but maybe someone knows a workaround which works.
Thanks for your reply, I do not want to call using DTMF, I was not clear enough :)
My customer receive a call from a Interphone and they need to press a code with the panel to open the door. They asked me, if we could send this code via SD. It is like a phone receive a call from the interphone and to open the door the person only need to press a button on the phone against press the whole code on the panel.