I've got a wireless ADSL broadband router at one side of a building,
but its signal is very poor at the other side of the building.
Therefore I need some sort of "repeater".

> On Thu, 21 Feb 2008 15:52:19 -0800 (PST), toe@lavabit.com wrote:
> Alternatives to a repeater are:
> 1. Power line networking:
> <http://www.homeplug.org>
> <http://www.netgear.com/Products/PowerlineNetworking.aspx?for=All>
> 2. Phone line networking:
> <http://www.homepna.org>
> 3. networking over CATV coax cable:
> <http://www.multilet.us>
>

We used these types of "AC wire" solutions to get an Ethernet connection out
to a loading dock area.
From there, we installed a hub and WiFi AP for the dock area...

You could use the "AC wire" solution to get an Ethernet connection to the
other side,
and then just install another WAP over there.
OR - use the "AC wire" solution to go between the ADSL modem and the actual
router/AP
which then could be moved to a central location.