Sharing broadband across half mile

I want to share my broadband connection with a friend who lives about
half a mile away.

I was hoping I could do this by installing antennas in both our lofts
and connecting it to a wireless access point connected to my Telewest
cable modem. There is a raised railway embankment between our two
locations, so direct line of sight is not possible. Is this a problem?

Can anyone tell me if this is a feasible option. Also, any
tips/websites where I can build the kit cheaply.

Dave D wrote:
> I want to share my broadband connection with a friend who lives about
> half a mile away.
>
> I was hoping I could do this by installing antennas in both our lofts
> and connecting it to a wireless access point connected to my Telewest
> cable modem. There is a raised railway embankment between our two
> locations, so direct line of sight is not possible. Is this a problem?
>
> Can anyone tell me if this is a feasible option. Also, any
> tips/websites where I can build the kit cheaply.

You can buy ethernet cable for pretty cheap, but about every 1,000 feet
or so you need to use a hub (repeater).

Seriously, sometimes non-line-of-sight works when it isn't supposed to.
The only way you'll know is to try it.

Dave D <(E-Mail Removed)> wrote in
news:(E-Mail Removed):

> There is a raised railway embankment between our two
> locations, so direct line of sight is not possible. Is this a problem?

If you are using a directional antenna with a focused beam pattern it will
likely cause a problem. Can you get your antennas any higher?

--
Lucas Tam ((E-Mail Removed))
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/

> cable modem. There is a raised railway embankment between our two
> locations, so direct line of sight is not possible. Is this a problem?

Chances are that it's a non starter as a direct link but there's another
way. This is what we had to do:-

http://www.nodomainname.co.uk/Equati..._broadband.htm

In other words, you'll either have to over or around.

> Can anyone tell me if this is a feasible option. Also, any
> tips/websites where I can build the kit cheaply.

www.nodomainname.co.uk/cantenna/cantenna.htm

David.

In article <G_udncMcTa5l00PdRVn-(E-Mail Removed)>,
=?ISO-8859-1?Q?R=F4g=EAr?= <(E-Mail Removed)> wrote:
:You can buy ethernet cable for pretty cheap, but about every 1,000 feet
r so you need to use a hub (repeater).

Which ethernet standard were you thinking of, that would support
such long distances between repeaters? 10BaseTX, 100BaseT, 1000BaseT
are limited to 100 meters per segment. One of the older standards
(5Base2 or something like that) allows 220 meters per segment.
But I do not recall any standard that allows one to approach 300 meters ?
--
WW{Backus,Church,Dijkstra,Knuth,Hollerith,Turing,v onNeumann}D ?

> But I do not recall any standard that allows one to approach 300 meters ?

No but we used to run our thin ethernet segments to 430m before they'd
fall over but then:-

a) The NIC's were manufactured by the company I worked for and they had
a special 300m mode (although most weren't set to run with that)

b) We were the tech support department

c) Had a time domain reflectometer to measure it when it all stopped



David.

"David Taylor" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ...
> > But I do not recall any standard that allows one to approach 300 meters
?
>

a thick ethernet segment (10Base5) is good for 500m - but this is thick
expensive co-ax, and you need separate transcievers.

> No but we used to run our thin ethernet segments to 430m before they'd
> fall over but then:-
>
> a) The NIC's were manufactured by the company I worked for and they had
> a special 300m mode (although most weren't set to run with that)

3com - their NIC cards for thin ethernet were certified to 300m
>
> b) We were the tech support department
>
> c) Had a time domain reflectometer to measure it when it all stopped
>
>
>
> David.
--
Regards

Stephen Hope - return address needs fewer xxs

On 27 Jun 2004 14:33:29 GMT, (E-Mail Removed) (Walter
Roberson) wrote:

>In article <G_udncMcTa5l00PdRVn-(E-Mail Removed)>,
>=?ISO-8859-1?Q?R=F4g=EAr?= <(E-Mail Removed)> wrote:
>:You can buy ethernet cable for pretty cheap, but about every 1,000 feet
>r so you need to use a hub (repeater).

>Which ethernet standard were you thinking of, that would support
>such long distances between repeaters? 10BaseTX, 100BaseT, 1000BaseT
>are limited to 100 meters per segment. One of the older standards
>(5Base2 or something like that) allows 220 meters per segment.
>But I do not recall any standard that allows one to approach 300 meters ?

Standards are made to be conservative and following them is a good
assurance that things will work under all circumstances and
environments. Standards do not consist of a brick wall limit, where
everything falls apart if slightly exceeded. The trick is to know
just how conservative they are, and what controls the real limits. As
always, breaking standards are risky, educational, offers a few
suprises, is lots of fun, and must be tested thoroughly.

I have installed wired network links running well beyond the various
specifications. For example, I have a 10base2 coax cable network
running on RG-6/u (CATV coax) at 1200ft. No problems or errors. Note
that there are commerical products that also do this:
http://www.multilet.com/us/baseband/...duct_range.htm

I routinely test 1000ft rolls of CAT5 cable by crimping connectors on
both ends and connecting them to a switch and laptop. No problems at
10baseT speeds, but not a great idea at 100baseTX. We had a
neighborhood wired ethernet system running 7 houses with about 500ft
of CAT5 daisy chained between houses. End to end was about 3000ft.
We tried to follow the 5-4-3 rule, but the topology was not very
helpful. I used switches instead of hubs (repeaters) and all was
well.

I've also used existing 25pair telco cable bundle at 600ft for
10baseT.

There are a bunch of other tricks to using overly long wiring
segments, and understanding their limitations, but since this is a
wireless newsgroup, methinks I'll avoid the inevitable flame war and
leave out the details.


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D 831-336-2558
Santa Cruz CA 95060 AE6KS

On Sun, 27 Jun 2004 00:18:20 +0100, Dave D
<(E-Mail Removed)> wrote:

>Also, any
>tips/websites where I can build the kit cheaply.

http://www.freeantennas.com
http://www.saunalahti.fi/%7Eelepal/antennie.html
http://www.seattlewireless.net/index...ctionalAntenna
http://www.seattlewireless.net/index...ionalParabolic
http://www.qsl.net/k3tz/ (2.4GHz patch antenna)
http://flakey.info/antenna/biquad/
http://flakey.info/antenna/omni/quarter/ (don't)


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D 831-336-2558
Santa Cruz CA 95060 AE6KS

"Walter Roberson" <(E-Mail Removed)> schreef in bericht
news:cbmlrp$80n$(E-Mail Removed)...
> In article <G_udncMcTa5l00PdRVn-(E-Mail Removed)>,
> =?ISO-8859-1?Q?R=F4g=EAr?= <(E-Mail Removed)> wrote:
> :You can buy ethernet cable for pretty cheap, but about every 1,000 feet
> r so you need to use a hub (repeater).
>
> Which ethernet standard were you thinking of, that would support
> such long distances between repeaters? 10BaseTX, 100BaseT, 1000BaseT
> are limited to 100 meters per segment. One of the older standards
> (5Base2 or something like that) allows 220 meters per segment.
> But I do not recall any standard that allows one to approach 300 meters ?

10BASE5 runs up to 500 meters.
10BASE2 is certified to 195 meters.
Early fiber segments as far as 3500 meters.