>
>Paul, the code is available from:
>
>http://www.ormix.riga.lv/eng/mchip/mchip.htm - PIC page
>ftp://ftp.ormix.riga.lv/mchip/sources/dtmf_dec.zip
>ftp://ftp.ormix.riga.lv/mchip/sources/dtmf_cod.zip
>
>(Thanks to Alexej Vladimirov  avlad@mail.ormix.riga.lv)
>
>Note that the decoder is not entirely satisfactory with respect to
>the 'standards', but works if the tones last for over 150ms.
>
>Regards,
>SJH

So what is needed to sort this problem out for dtmf under 150 ms ?

--
PAUL B