I don't know too much about wifi abilities.  I suspect you're 
beyond the limits of basic wireless connectivity.  Is there any 
electrical power, phone lines, etc. available that could be 
utilized?  Maybe add some kind of a/c powered wireless signal 
relay/booster - (2 wireless access points on different channels - 
one to the trailer, one to the house?) connected to a desktop in 
the middle of the property?
l-com.com claims to have some connectivity equipment for 
distances, but it gets pricey.  You could contact them for ideas. 
  Is dsl an option?  Prices seem to keep dropping.  Just thinking 
out loud.

Margie wrote:

> Hi,
>     I am trying to set up a wifi network for my son and his daughters.  The daughters live on the same property, about 1600 feet behind the dad, and we are trying to get the signal to go to their trailer. There are some obstructions like trees which may be in the way.  With my laptop I could pick up a great signal about a thousand feet away, half signal 1400 feet and then no signal when we get to their driveway.  We have purchased a 2.4 GHz range extender 5 dBi omni directional antenna with a 4 foot cable.  It is connected to a Linsys Wirelss G Broadband Wireless Router.  We still cannot receive a signal to their computers, which do have Linksys WMP54GS wireless-G PCI Adapters with speedbooster in each of the girls computers.  It still won't reach their computers.  I was wondering if there is some kind of a setup that we can put in their trailer that will draw the signal to their computers.  Oh and their desktops are sitting on the floor.
> 
> They all have Win XP Pro.
> 
> Thanks very much
> Margaret

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