Harware for 70km p-t-p wireless link

I should like to connect two campuses with point to point wireless links. These campuses are about 70km apart.

I do not know what hardware works for you.

Hi there. We have a 60km link using the Mikrotik router boards and 400mW minPCI 802.11a cards. With 32dBi dish antenna they connect at 54mbps and the cards are only on half power. 5.8GHz is better for backhaul links as they are not affected by rain and bad weather as much as 2.4GHz is.
Cheers
Dale