Paul_KD7HB:
With the limited information you have given, it's impossible for anyone to give an answer.What code are you using?
Show us a schematic of how you have this all connected.
Do you actually have this connected to a land-line telephone circuit?
Is your program detecting the "ringing" of the telephone?
Paul
It is connected to a regular telephone. And it is not detecting the "ringing". Actually I am using the 8 dip HT9032D which does not have a ringing detection.