I wrote: Its a little wrong
========

It is transmitting and doing call progress OK but the problem is that it is not at decoding the received DTMF data.

Although the interrupt at IRQ pin 12 IC is occurring that this pin on any DTMF tone received goes low.

Here is the Errata: correction in prenthesis,
===================
It is transmitting and doing call progress OK but the problem is that it is not at (all) decoding the received DTMF data.

Although the interrupt at IRQ pin (13) IC is occurring that this pin on any DTMF tone received goes low.


Thank you for double reading

Simon