How to decode the dtmf tones in a cellphone?

[yahaa]

how do i decode the dtmf tones in a cellphone??
i found many circuits on net where one can decode telephone dtmf tones using 8870 ....in using the same ic to decode cellphone dtmf ..does it require any change in the circuit???

circuit link: www.electronicsforu.com/EFYLinux/circuit/jun2003/CI-2-DTMF.pdf

can i use the same circuit???

 

[buntheun]

Re: celphone dtmf

https://www.edn.com/archives/1994/101394/graph/21di5fg1.htm

 

[budhy]

Re: celphone dtmf

how do i decode the dtmf tones in a cellphone??

There are no DTMF tone in a cellphone!

 

[yahaa]

Re: celphone dtmf

cell phones can produce dtmf tones...once connection has been established
thats what i read somewhere

 

[fiberdriver]

celphone dtmf

sounds like what you need is a simple dtmf decoder. schematic and info can be found at

**broken link removed**

yes a cell phone can generate dtmf and receive it as well.

john