am trying to make a link about 65 to 70 km.am using a 433rb and 411rb, 2xr cards one on each router.am able to see each end but can;t connect for 5min.

am getting -81 to 86. can this be that the distance is too long.

Are you running Nstreme, how are RBs set up. Post the configs. I have about 12 links that are in that distance range that all run fine with around 10 to 30 Mbps of traffic.

am not running on nstreme and running on 5ghz and frequency on 5260 wds mode dynamic on bridge1.
data rates is on default

I have experience making a NLOS XR5 link work at 58 miles PtP. Here are my recommendations.

enable nstreme
enable polling
disable csma

turn on adaptive noise immunity (client & ap mode)
set HW retries to 15

set data rates to manual
disable all data rates except for 24mbps on both sides

During testing, just use bridge and client mode to reduce likelihood you have some kind of misconfigured WDS settings. You will not be able to pass traffic through the link but at least you can ping the units.



I would venture to say that if you do not use nstreme you will NEVER get this link working correctly. So if you are unwilling to employ nstreme you might as well shut this project down.

If you get the cards working with 24mbps you can try 36mbps. Based on your signal strength I would not recommend above 36mbps (48mbps and 54mbps require 77 and 74mbps signal strength, respectively.) When I was working with XR5 PtP links, I found that setting a single data rate instead of multiple helped with CCQ.

I would start with these recommendations and tweak from there.

let me try and i will get back to you and thanks for the help.

am able to get signal strenght of -76 on both sides without nstreme and supported data rates not configured.
but the signal to noise keep flapping from 20 t0 2 db and getting low throughput of about 300kbps.

the grid antenna am using are 29dbi so i want to try with 31dbi.

That will only gain you 4db of strength. YOu may be looking at fresnel or line-of-sight issues at this point.

Also, for a link this long, thermal induction may be playing with your signal. My 58mi NLOS link bounces from -55 to -85 thoughout the day.

Let me put it a different way.

For a 44mi/70km link, your free space loss should be 144db.

29dbi antennas (properly aligned) should yield +58 gain
XR5 @ 24mbps has a gain of +28

58+28-144= -58

That does not factor in cable loss obviously but if you are missing about 20db of signal then I suggest to you that you have LOS issues. Adding 4db (2tx+2rx) to your link budget isn't addressing your root problem which is either significant cable loss or (more likely) fresnal/LOS issues.