MT8880 and 2 wires telephone lines

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Hi,

Do anyone know how to integrate MT8880 DTMF generator with traditional
2 wires telephone lines? That is, the remaining circuit to interface
with ring and tip. I only need the transmitter part.

Thanks!

 

[Martin Riddle]

You need whats called a 'Hybrid' to go from MT8880 to POTS. Actually half of one. Plenty of app notes out there. I think National
has what your looking for.

You should also look at Part 68. http://www.fcc.gov/wcb/iatd/part_68.html


Cheers