Telephone Ring Count Circuit

I'm building a telephone ring counter circuit.Need to check the attached circuit.

I have two questions

1)How many pulses will comes out per one ring from opto output?
2)what are the voltages in the telephone line ? When idle -48V DC & when rings 90V AC?

Canadian telephones ring with a 20Hz frequency. We do not know the frequency used in your country. Some telephone companies ring long distance calls with a different cadence (ring ring pause, ring ring pause).
Some telephone systems ring with 90VAC RMS on top of the 48VDC, others have different voltages.