Thanx, Lotondo.

But i do have the pinout of S65 and even service manual of C55/S55 (they are similar to S65).
Perhaps i should give some more detail of my problem.


I started with 16F84 and serout2 commands. Everything according to this thread.
Pic is connected to the phone through the MAX232 and original data cable, which came with tthe phone. I managed to connect pic and pc with 9600 baud and lower in bidirectional mode. No problem with that. Phone and pc communicate very good as well. Tried all kinds of commands, even sniffed on com2 port to see how original Siemens software is sending sms from pc.
Than i made an adapter, in order to determine how many wires are essential for communication between pc and phone using original cable. Result: 3 wires if enough for communication (did not try GPRS), AT commands are working from hyperterm.
Now, if i connect the same 3 wires to the pic, phone does nothing!!

This is driving me crazy for 2 days already

From this all i concluded, that problem is in Siemens original cable (?). Dont know what the problem, unfortunately. Gonna keep on trying.

Also desided to shift to pic16f870. Has more capabilities. Tried to send
Hserout ["ATD phonenumberhere", 13, 10]
at 9600 baud and received it on pc without problem. Phone still does nothing.

Should name it Enigma instead of Siemens