DTMF circut with nokia 1100

[falcon _bd]

i want to connect a DTMF detector chip (like  MT8870  ) with a nokia 1100 to controll multiple device and get the status of devices with the dtmf tone.and i want to use pic 16f876 .  i need the circuit diagram of MT8870 and mobile headphone connection. plz help me

[sohel]

i am not using it but u can check it.

http://www.riasc.net/marketsms.aspx

Supported phones:
Nokia 1100, 2100, 3100, 3105, 3108, 3200, 3210, 3300, 3310, 3330, 3350, 3390, 3410, 3510, 3510i, 3560, 3570, 3585, 3585i, 3586, 3590, 3595, 3610, 5100, 5110, 5130, 5190, 5210, 5510, 6100, 6108, 6110, 6150, 6190, 6200, 6210, 6220, 6250, 6310, 6310i, 6340, 6340i, 6510, 6560, 6590, 6610, 6650, 6800, 7110, 7190, 7210, 7250, 7250i, 8210, 8250, 8290, 8310, 8390, 8810, 8850, 8855, 8890, 8910, 8910i, and ANY AT COMMAND SUPPORTED!!!

[falcon _bd]

I think all of these nokia phone are not support the AT command.  some  nokia phone (with out modem) support FBUS or MBUS command.