Wireless ISP structure ideas please?

Hello,

I am planning to provide internet wirelessly for long distance (2 - 3 Kms) point to multipoint, so here is my plan:

  • a RouterOS installed on 386 with Wireless Card connected to an amplifier then to an omni antenna (currently 8db)
  • clients will be provided with Antenna (directional 14db) connected directly to an Access Point (Edimax)

Questions:

  • how do I have to configure the AP at the client (bridge? client mood? Repeater?)
  • do you think onmi 8db is enough?

Thanks

wireless is here: http://forum.mikrotik.com/viewforum.php?f=7