Setting up Point-to-Point Wireless Bridge

aborodin

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I work for a small business that recently expanded across the street. I'm setting up the security system using IP cameras and the owner would like record on his computer in the original location. The feeds take about 15 Mbit of bandwidth.

I figured the best way to do this is two routers set up as wireless bridges. However, to gain maximum bandwidth and to minimize bandwidth loss, I assume we'll need to use directional antennae with line of sight across the road, about 15 meters. The buildings have line of sight to one another, and are built of thick concrete block. The wi-fi signal from one building to another is weak, but detectable.

With this in mind, I have a few questions:


  • What's the optimal setup? Do I place an outdoor range extender on the roof? Do I place an access point and connect to ethernet that runs down the side of the building into a window?

    What routers do I buy? Or is there a more suitable, dedicated piece of hardware that I don't know about?

    What kind of antenna am I looking for, if I need one?

    I'm trying to keep the budget for this below $500 dollars USD. Is this laughably unrealistic?

Appreciate your help. Let me know if I can clarify anything.
 
Solution
With the building being concrete block you really need your antenna outside the building. Either on the roof or attached to the side of the building. Do you have a clear line of site between buildings without obstructions?
If you have a clear line of site I would use two Ubiquiti Nanostation LocoM5's to make the bridge. They can be mounted outside.
Radios (you will need 2): http://www.amazon.com/Ubiquiti-US-FCC-NSLOCOM5-NanoStation-loco/dp/B004EHSV4W/ref=pd_cp_pc_1
Mounts: http://www.amazon.com/Ubiquiti-Networks-NanoStation-Window-Mount/dp/B004EHUR8U
At that short distance you will want to turn the power down on the radios so they do not overpower the connection.
With the building being concrete block you really need your antenna outside the building. Either on the roof or attached to the side of the building. Do you have a clear line of site between buildings without obstructions?
If you have a clear line of site I would use two Ubiquiti Nanostation LocoM5's to make the bridge. They can be mounted outside.
Radios (you will need 2): http://www.amazon.com/Ubiquiti-US-FCC-NSLOCOM5-NanoStation-loco/dp/B004EHSV4W/ref=pd_cp_pc_1
Mounts: http://www.amazon.com/Ubiquiti-Networks-NanoStation-Window-Mount/dp/B004EHUR8U
At that short distance you will want to turn the power down on the radios so they do not overpower the connection.
 
Solution

aborodin

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May 29, 2014
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Thanks for the link! Are these the right steps?

1) Using the mounts you linked, mount both antennae.
2) Run an outdoor Cat5e to my PoE switch connected to my router on my "home" building.
3) Run an outdoor Cat5e to my PoE switch connected to the cameras on the "away" building
4) Configure the bridge setup using the client software.

Based on product description, I don't even need to buy a router and put it in bridge mode, correct?

I deeply appreciate your help.
 
Yes that is correct. Putting the antennae in bridge mode you would just extend your LAN across the link and would not need another router at the "away" building.
Yes your steps look correct for installing.
For optimal performance after you install everything go over to the Ubiquiti Airmax forum and tell them what your doing and post screen shots of your software setup. The experts there will tell you if you have everything set up best. Also if you have trouble getting it to work you can go there for help. In fact I would use the forums before trying to contact Ubiquiti tech support (unless you think there is a hardware problem).
 

aborodin

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You've been incredibly helpful. Thanks!
 

Ubiquiti site is being a pain tonight so I could not check this unit. A lot ubiquiti stuff does not really run PoE...ie 802.3af. They do provide power over the ethernet cable but it is using their own adapters. Many of them are either 12 or 24 volt rather than the 48volt standard.

It won't hurt to plug them into a real 802.3af PoE switch they just do not do the signally to activate the PoE and cannot draw power from a 802.3af switch

I really wish manufactures didn't hijack the term PoE.

Still ubiquiti is a great product and I have used their equipment many times with good results.
 


Good point bill001g. I believe it is not standard. This is what it says on the data sheet:
"The NanoStationM may also be
powered by the Ubiquiti Networks
TOUGHSwitch PoE. In addition, any
NanoStationM can easily become
48V, 802.3af compliant through
use of the Ubiquiti Instant 802.3af
Adapter (sold separately)."
They do come with POE injectors though, if it won't work with your POE switch.