Wireless network between two buildings?

[Gizmo200118]

I want to connect my computer with my brothers computer. He lives about 170 meters away but there is another building in between mine and his. Is there any way we could connect them with a wireless network and still get OK speed. If I would have to use an different antenna for the network I would prefer on the can be mounted in doors because it would be difficult to mount it out side of my apartment.

Any ideals on what hardware we would need? Thanks

[Quattro]

I've got a Belkin 54mb/s wireless that says it can go 1500ft...?

It's currently going through a floor and a wall and it runs at 100% speed.

[Gizmo200118]

I am thinking about buying a D-Link 802.11g Xtreme G Wireless Router

Model: DI-624 and D-Link 802.11g Xtreme G Wireless Desktop Card

Model: DWL-G520 It says the Router can got 108 Mbps and up to 1300+ft but i bet it can't do the 108 at 1300ft. Just as long as I can get a steady 5+Mbps I will be happy.

Does anyone think this will work or do you think I should try something different. I Wouldn't be worried but there is a big building right between our houses. If it was a clear shot i would say it would make it no problem but you don't know until you try

[Quattro]

You might as well try it and if it doesn't work get bigger aeriels.

[Absolute Zero]

you could buy a directional antenna. some of those aren't that big and can give you as much as 50 db improvement in signal strength.

[Ddruid_SMP]

you could buy a directional antenna. some of those aren't that big and can give you as much as 50 db improvement in signal strength.

Umm, I would like to see a 50db antenna that falls into FCC Part 15 rules. FCC states that the maximum eirp of a ptp link is 48db (in a round about kind of way, it is confusing to read), the highest gain you are likely to find is going to be 29db.

With a large building in place I would be extremely hesitant that it will work at all using 2.4ghz equipment. Forget the 108Mb garbage, to eastablish a 108Mb link the recieve sensitivity is down in the -40db's, and your are *NOT* going to get that. Save your money and buy an 802.11b standard. The recieve sensitivity on most .11b equipment to establish an 11Mb link is around -84db. In addition, the 108Mb garbage spams the entire spectrum and is highly susceptible to noise.

Again though, if the building is as big as you state it is likely not going to work.

802.11b in action:
http://www.bpsnetworks.com/~rhaas/wireless/MVC-492S.JPG
The two distinct humps are two seperate AP's one running on channel one, the other is running channel 8. This is aimed away from both AP's..

http://www.bpsnetworks.com/~rhaas/wireless/MVC-495S.JPG
Aimed at the AP running channel 8. I captured these while looking arround a town that we are getting ready to deploy our own AP.

[Absolute Zero]

i saw it on tech tv. it was a like a handheld sattelite antenna, and i don't know if you had to be military personnel, but the site did say 50db improvement in signal strength. i'll try to find a link.

[Ddruid_SMP]

They do make extreme gain antennas, but they are either A) Require a HAM License or B) Mil. Spec. Either of which the general public will have a hard time getting a hold of. Much like someone buying an amp that has a higher transmit power of 1watt. FCC rules allow 1watt (30dbm) max before the antenna, for a ptmp system the max eirp is 4watts (36db), for a ptp system it is 48db.

[Absolute Zero]

sorry, you sound very knowledgable regarding wi-fi signals. i was just spouting some drivel i heard from leo laporte.

[Ddruid_SMP]

No reason to appologize. I am an admin for a WiSP, so unfortunantly I have had to learn relevant parts of FCC code that pertains to our network. We cover about 1700 miles in area wirelessly, with backhaul links ranging from 8 miles to 32 miles. Most customers are 1 - 5 miles from an AP with some upto as far away as 9 - 11 miles out.