Dtmf Digit

Some articles on dtmf, dtmf digit:

Internet Radio Linking Project - Requirements - IRLP Hardware
... The most difficult part being the DTMF decoder which consists of a MT8870 (or similar) DTMF decoder IC and HCF4081 (or similar) and-gate IC ... parallel port pins 10,12,13,15 in order to acknowledge a DTMF digit ... MT8870 pin 15 provides a pulse when any valid DTMF digit is decoded, so this signal is used on one input of each gate on the HCF4081 ...

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    Bless my soul, Sir, will you Britons not credit that an American can be a gentleman, & have read the Waverly Novels, tho every digit may have been in the tar-bucket?
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