dtmf decoder circuit

hello everyone.....

can anyone please send me a mt8870 dtmf decoder circuit for connecting it directly with the telephone line????

i searched it on google and got a lot of different circuits...but i checked a few of circuits and those are not responding correctly...so i need a correct working diagram of that circuit.......i m going to do a project that is based on IVRS based colllage automaton...
so anyone please help me....its urgent....

by ur friend ,
RENIL

Check out the below link...

http://www.siongboon.com/projects/2005-07-18_dtmf_circuits/

[Topic moved to Electronics forum]