[AusNOG] Ubiquiti Rocket Transceiver pair - which antenna ??

[Ross Wheeler]

> Has anyone worked with this type of solution who could tell me what antenna / dish / bla units we should be looking at ?
>
> The goal is to have a directional transmission that is super reliable (key) as there is no DSL or backup solution for this location.

If you want "super-reliable" I wouldn't be considering the ISM band. 
Period.

That said, I ran a 3.6km link on 2.4GHz ISM band between my home and 
office for 12 years with zero dropouts. That was likely helped by:
  (a) being in a regional area with little or no competition in the band at 
the time

and

  (b) using 28dBi gain antennas to reduce the effect of any other users in 
the band at the time.

ubiquity gear works well, especially for the price.
There are other vendors with better equipment and higher reliability.
There are licensed bands which afford you LEGAL AND REGULATORY PROTECTION 
from others who would cause you problems.
Any single link is a "single point of failure". If you really want 
uber-high-reliability, you will want two+ links, ideally with some path 
diversity, in different, licensed spectrum.