help on choosing

[Dimitris]

Hello
I want to link 2 (or 4) places with distance of about 10km.
First place is 20m above sea and the second is 600m on a mountain.
Sea is between them. The LOS is clear.
The second place is at FM radio's antenna park.
I want the use 2 ip cameras and in future to transmit audio (mp3) over this link.

Also close to the second place about 500m and 700m are 2 houses where I want voip.
Do you have something to suggest ?

Thank you.

[Dave-D]

Dimitri, the first one is easy: use Rocket M5
with Rocket dishes--if you can find some.
Depending on the data rate, you could also
use two Bullet M5 with 30dBi grid antennas.
In that case, horizontal polarization is nice.

I don't understand your second link; what
is (or are) the paths involved? And what
is the relationship between the first link
and this second one? Dave

[Dimitris]

Thank you Dave for the answer.
To make things more clear I want to link 4 places. All are in the same line of sight.
Distance:
(A------------------B---C---D)
A to B = 9000m
B to C = 500m
C to D = 500m

Height:
A = 20m
B = 400m
C = 500m
D = 600m

The problem is that only A can see B,C,D. (B,C,D are on a mountain and can not see each other).
I suppose that A should setup as AP and B,C,D as clients.
Can I do this with Bullets M5 ?

Thank you

[WHT]

The problem is that only A can see B,C,D. (B,C,D are on a mountain and can not see each other).
I suppose that A should setup as AP and B,C,D as clients.
Can I do this with Bullets M5 ?


If B, C, and D are all within a 40 degree arc from A, then I'd use a Nano M5 at point A as an access point, and B, c, and D with Nano M5 radios set as stations.

[Dimitris]

yes.
B,C,D are less than 30 degree arc from A.
Can Nano go that far (10km) ?

[Dave-D]

Dimitri, if points B, C and D aren't in sight
of each other, than you have virtually
three links of about 10Km. This is really
beyond what I'd use a NanoStation for.

You haven't said what your data rates
need to be. For really high-speed, I'd
consider the Rocket. But let's not.

Bullet M5 is inexpensive. To cover the
horizontal spread, use two Bullets at
point A with two 21dBi grid antennas.
Each will cover about a 10deg swath;
with any luck, you'll cover B, C and D.

Use Bullets with 30dBi grids at the other
three points, for a little extra path gain.

Does this work? Dave

BTW: I hope the mountain that B, C and D
are on doesn't obstruct the path to any.

[WHT]

yes.
B,C,D are less than 30 degree arc from A.
Can Nano go that far (10km) ?
Then a regular Nano 5 would work, but for about same price use a Nano M5.

10 KM (5 miles) is pushing it with the Nano family for faster data speeds.

So...consider this...

Since B,C, and D are within a 30 degree arc, then an 11dBm, 30 degree flat panel antenna and Bullet 5 would work for the AP. And for the stations, use a Bullet 5 with 24 dBi grids all pointing back to the AP.

The Bullet M5 is only certified for specific UBNT manufactured antennas, where the Bullet (standard) has no such restriction.

I have a pair of standard Bullet 5 radios with 27 dBi grids and they have 17 dB fade margin at 22 miles at 12 Mbps data speed. You are half that distance so results would very close.

[johnhomer]

The Bullet M5 is only certified for specific UBNT manufactured antennas, where the Bullet (standard) has no such restriction.



Hello WHT, what do you mean by this? kindly explain.

[WHT]

That is for U.S. use. Other countries have different requirements.