Re: [isp-wireless] Alvarion VL Problem

["Kees CB" <wireless@...>]

It has been running for 4 years.  Usuallay I have 2 frequencies to play 
with.  Now both seem problematic.  (all seem problematic)

Here is the SA from the AU.  Not sure how to interpret this.

5740    269    21    255    1
5750    364    23    237    216
5760    446    23    342    1
5770    343    21    255    0
5780     329    21    255    0
5790    405    22    254    0
5800    444    21    255    1
5810    238    21    255    0
5820    140    21    255    2
5830    40    20    255    60

(5750 & 5830  is us on other links)

The modulation levels are pretty much in the same area.




> Was this running fine before or is this a new install?
>
> This is usually caused by interference.  You are dropping radio packets 
> and retrying which causes the delays.  Look at the site surveys and check 
> the modulation level errors.
>
> You need to fine tune your radios.  About all you can do is drop the max 
> modulation level down on each device until they are mostly running without 
> errors.
>
> Max modulation runs from 8 to 1.  We usually run cleanly around 4 or 5 in 
> our area.  Higher is better for speed but worse for noise immunity and 
> signal level.  Lower is better for signal strength and noise immunity but 
> less bandwidth available.
>
> This same concept is used on most OFDM based radios in use today.  We use 
> it on Mikrotik, Alvarion, Redline in our network including 900, 2.4GHz, 
> 4.9GHz, and 5.2 to 5.8GHz.  Learn it, understand it, and use it to your 
> benefit.
>
> Good luck,
>
> Tom
>
> At 06:04 PM 7/2/2008, you wrote:
> > I have an 5.8 AU that I have no problems pinging from the ethernet side. 
> > However ping times across the AU to the SU's are all over the place.
> >
> > I tried several frequencies.  Same problem.
> >
> > It does not seem to care what time of the day it is.
> >
> > Any suggestions?
> >
> > Thanks in advance.



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