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Posted by Mr. Jean Fernandes (200.167.127.125) on May 30, 2003 at 19:42:37:
Dear Sirs
I am developing a CPU 8051 based in order to perform control on my home. I have a PABX and the idea is to connect CPU on ramal of PABX. So, I am needing :
- Telephone Front End Circuit to
- Connect the CPU on Phone LIne
- Detect the ring tone.
- After 3 rings, pick up the ~phone~ and read the DTMF tones.
I am using the MT8870 IC to read the DTMF tones. BUt I dont know how to connect it on phone line (I am needing a circuit)
So, I am developing a smart phone capable of control lights, alarms, moving sensor, CCTV sequential, and so on. All over phone line.
Please help me.