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Hii..Could u plzz suggest me How to connect earphones to DTMF circuit?

Hii..Could u plzz suggest me How to connect earphones to DTMF circuit?..Its finding very diffult to judge wass d desire Terminal to interface to circuit..When i strip the wire one among the pair of wires, i find two thin wires with more insulated silk material..in this a brain feeding doubt arised that among these two thin wires which wire should be judge as Tip..Nd i bought a DTMF decoder CS9370DGP..is this is same as MT8870 specifications nd circuit?Plz do reply..nd if possibl plz post me circuit diagram using CS9370DGP..nd plz attach the stepwise pics that should follow while connecting the earphones to circuit..Plzzzzzz help me.......plzzz frnd:confused::(?