need help in....mobile phone based voice interactive system.

[drbizzarow]

ASA
hi 2 all
im currently working on voice interactive system ..........
im using cell phne at reciving end. can any body tell me how do i detect which key pressed from the dialing end ?
do i use AT cmmands or DTMF tone decoder ic ???
thx.

 

[ajay_bhargav]

you need dtmf decoder IC 8870... you can make auto answering of phone.. also you can store preprogrammed voice in your controller using Roman Black's BTc Algorithm.

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www.8051projects.net

 

[drbizzarow]

thx for your help .... same idea is running on my mind.
i m here for diffremnt sujestions ...... to findout best way thx again.
if any body hav another idea pls share thxin adv.