20km Link, how to ?

I need to configure a 20 km link in this feature :


school on moutain

<-20km->




city, pretty high
block (11 levels)


difference of high, betwen school and this city is some 500m-900m.

My quastion is, what a hardware I need to use to configure it ?

??
Lucas

Please visit http://www.mikrotik.com/3index.php.

rgds/ldv

Where I can buy this dish http://www.mikrotik.com/wireless.php#RB_RPO
in Poland ??
In my country I newer see it in e-shops !

buy it from mikrotik