HI, all is this possible?
i want make PTP for home and office ,but both site couldn't see each other , because there have piedmont between ,can i use directional antenna to make it work?

This is very depend one...
What's the distance?

one straight distance about 3 mile, the other one straight distance about 20 mile. is ptp signal go straightly or curved? can we make signal direct to sky and use GPS to verify location then to calculate right direction and elevation angle, let the signal matched in the sky. is this possible?