Outdoor Wireless Bridge connection drop


we have a 2 office buildings aprox 200 feet apart.

We setup a wireless bridge between the two buildings.

The antennas are directional.  The make of them are d-link 1800

Access points are TP Link WA601G.

We find that there are slow downs and frequent down time.  Does anyone know if the setup we have is sufficient?  Any recommendations?

Simon ChenNetwork AdministratorAsked:
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A couple things: Use  a program like Network Stumbler http://www.netstumbler.com/downloads/ to do a wireless survey of the area surrounding both buildings and in between them most importantly. See what channels are being used elsewhere and try to switch to a channel with less interference.

Also, make sure the antennas are dead on centered- use a laser pointer to make sure. If you have the budget, try using a parabolic dish-type antenna such as the one found here: http://www.cyberguys.com/product-details/?productid=24508 . Shop around the web for something that is described like that and looks like that too, and you should be set.
Simon ChenNetwork AdministratorAuthor Commented:
Thanks BiofishFreak.  We will make a trip down there sometime next week to try your suggestions.
Wiill a laser pointer work well outdoors during the day or is there a special type of laser we will need?
That's a good question... Try hitting up your local hardware store and ask them. I know that green lasers are easier to see during the day, but they cost more.
Keep me posted on how things work out.
I agree with doing a site servery.

I did this a few years ago and was trying to shoot about 900m. Had a 2m (1watt, 24db) long cannon on one end with a 12db yagi on the other.

The problem you may also come across is you will have excellent signal strength but link quality is poor. I found this was due to too much interference on the 2.4ghz range. Try some channels other than 1, 6 and 11. I know you probably already have the gear but, If you still have troubles i would suggest trying the 5.0ghz range.

Try lining them up like BioFish said. That along with moving the channels would be my first movements.

Can I ask...
Is it happening at the same time everyday?
What is the signal strength the receiving access point is getting?
What is your average ping time to the receiving router?
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