Wireless Networks Thread, Laser Link Problems in Technical; ya true when is foggy link goes down but is being used over 7miles...
25th May 2010, 10:57 AM #16
ya true when is foggy link goes down but is being used over 7miles
25th May 2010, 10:57 AM #17
Is it always exactly at 12 o'clock?
Can you ping or contact any servers on their end before 12 o'clock?
Have you checked that the laser is powered on (you can use a digital camera to see the actual beam)?
Does anything specific happen at 12 o'clock?
When does the internet disconnect each evening?
25th May 2010, 10:59 AM #18
What's the max distance for a laser link?
Originally Posted by postie28
25th May 2010, 11:07 AM #19
thats the thing we dont really support this link when we took the building over the link came with it but trying to talk to the school or 3rd party are useless
25th May 2010, 11:12 AM #20
Sunlight effects east-west links more than any other(due to the sun being low in the sky) and the installers would/should have installed sunshields on each end if it is an east-west setup. See if the laser heads have a management interface you could ping - if you do a continuous ping on the other sides management interface and another internal ip address on the other site you should be able to see if the laser link is actually going down.
Even better if they do have a management interface and you are able to access it that may also be able to give you an idea about whats going on.
In general the only thing that will affect a laser link is dense fog and direct sunlight.
We're getting a laser link installed next week... I've done far too much research
25th May 2010, 04:50 PM #21
Im with KCL on this one,
I have had these knocked out for weeks at a time during specific time of day at specific times of year when the Sun desenses the reciever at one end.
If you have the sun even indirectly in the lens it can desensitise the reciever until the light levels have dropped below a certain level.
You can fit tubes/shields to minimise the problem but some early morning sunrises can seriously cook these devices and until they cool down/stabilise they stop working.
We had one in a school in Peterborough that would drop out every day in summer for around 3 hours in the afternoon.
Fitted Shields and everything still needed to fail over to Wifi though for around 30 mins until a few weeks had passed then the Direct ingress issue passed and everything worked fine until next summer!
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