Creating a 10km wireless bridge...pointers?
outbackdingo at gmail.com
Sat Mar 21 06:27:46 PDT 2009
Just take some advice from the owner of a WISP... and a FreeBSD user.
if your only trying to get connectivity a less then 500 USD this is easily
buy a couple high end radios with built in antennas, Ubiquiti PowerStations
come to mind, place 1 at each end of the link
if line of sight is close to good, your done. Ive done numerous long
distance links, longest being 17km in extreme terrain
spend the money, have 0 headaches, itll even do PPPoE for the DSL link, if
you want to add a BSD box fine, but in this instance its really not needed.
On Sat, Mar 21, 2009 at 8:16 PM, Polytropon <freebsd at edvax.de> wrote:
> On Sat, 21 Mar 2009 06:43:01 -0600, Modulok <modulok at gmail.com> wrote:
> > Something
> > like:
> > LAN<->BSDrouter<->modem<->Antenna<~~air~~>Antenna<->modem<->DSL
> Your BSD router would act as a gateway, eventually using
> functions like "IPDIVERT and DHCPd via RF". It would then
> serve as an AP, put in simple words. This should be achievable
> mostly by means of the base OS.
> For the RF transmission part, you will need antennas (yagí
> type ideally) with a good signal gain and narrow radiation.
> It's possible to build them, but I'm sure they're sold, too.
> Optionally, a power amplifier (PA) may be added on both
> ends to strengthen the signal if it's too low.
> In case you have something in the way that hinders a direct
> view from your desired AP to the client (e. g. a mountain),
> things get a bit more complicated, a repeater would be needed.
> But as long as you can see it, you can connect it. :-)
> Coming back to your suggestion, I'd express it as follows:
> ~ > ~ >
> V V
> +--------------+ | < ~ < ~ |
> | wireless NIC |---+ |
> DSL in +--- ^ -- v ---+ | +--------------+
> the wall--*-->| ethernet NIC | +---| wireless NIC |
> at your +--------------+ +--------------+
> site your FreeBSD "AP" box client's box
> * insert modem if needed
> I'm not sure why wou want to employ a modem on the client's
> site. If it's only about Internet access, it's usable via the
> WLAN component already. If you want to handle IP telephony and
> multiple clients... well, more complicated, the client's all in
> one modem / spliiter / router / DHCP server / firewall / whatnot
> would need to connect to the RF "bridge", I'm not sure if this
> is possible even if the modem offers WLAN antennas.
> > Tips? References? Advice?
> Sorry, no. :-) Just some basic thoughts from a radio amateur and
> FreeBSD user.
> >From Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
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