In this week three routerboards have been hanged up! Maybe because of -30° 
Keep us posted!
We usually get one to three weeks of daily temperatures like that in Maine at the end of January/start of February. I hope mine fare better. Other ISPs in the colder parts of the US have had good reports of RB5xx in cold weather.
~ -25 - no problems with RB5xx and RB2xx
well look at this:
http://wiki.mikrotik.com/wiki/Image:IM000395.JPG
routerboards working, no problem
This is awesome.
seems like mine didn’t survived or maybe it was just coensidence.
RB232 with generic CF cards were running OK during -30Celsius un top of 2 40meter towers, but then when became a little bit wormer both CFs lost all data on them.
first gave error message error not mount disk
other just simply reported no software installed
now I have 2 RB with demo keys 
If you change cards and problem is gone, could you tell us wich one u use?
Cheers…
I was discussing this at MUM and I get the impression Mikrotik will be looking into this further…
If you look up the IC’s used on the Routerboard eg processor 79RC32H434-266BC
see http://www.idt.com/products/files/571501/79RC32434_ds.pdf
You will find that some of the IC’s used are rated “Ta Commercial Ambient Operating Temperature 0 +70 °C” what this means is the specification is guaranteed between these temperatures not that at -1degC the IC starts playing up!
Due to manufacturing variability you may find some IC,s still working down to -30degC plus the heat generated inside the IC helps.
The common way of testing finished products is to pop them in the deep freeze (-25degC) the problem is you could have a batch that keep working during your testing stage and -30degC is a bit extreme.
The way Mikrotik have built there boards is quite normal, in fact the build quality is excellent it’s just we want them to work at the north pole and the hottest desert and not cost any more )
So how could you get round this problem…
Use product with Ta Industrial Ambient Operating Temperature -40 +85 °C..not a option yet
Add a heater and thermostat in box, if you can get enough power out of POE or run extra cable. I would think the best way is a resistor glued on top of each, of the low power IC’s thus minimizing power used and putting it where needed. There are small thermostats (about the size of a 1W resistor) available that cost a couple of Euros.
If the units are not subjected to a high summer temperature a little insulation ether on the IC’s (not the processor it will get hot) or around the box, but keep a eye on the temperature!
The processor gives off 1.3 to 1.8 watts, place a small sheet of aluminum touching each of the IC’s to transfer some of the heat between them. The metal should touch the IC’s as close as possible, have heatsink compound or thermally conductive glue between to help, this could act as a heatsink so may need insulation as well.
Regards Andy
CF cards are original, provided from mikrotik - I dont know who is manufacturer (MT sticker is on top of model and producer label)- mikrotik could tell it better, because they where bought together with RB some 1+ year ago.
one other way, the reason could be low temperature+power disturbance. because second one which reported that no OS is installed worked untill few times rb was restarted using PoE switch off/on
but first CF is 100% cold problem.
we had routerboards testing for many days in the refrigirator (in the freezer, like -20C) and they worked fine. we also used the fan which you use to remove paint - tested up to +70 and it still worked. so and you also seen the pictures with the frozen towers … mostly it works, maybe it is a humidity issue.
mikrotik CF is PQI. if you really need tough CF, you can try Sandisk Extreme III, maybe it is better
Normis
Where is the place or country of the picture very cold??
Maxi
It must be at the end of the world
actualy it is in italy, on some mountain. a customer gave some of these pictures to me during the MUM
The location is central Italy.
We are usins an alluminium ip67 case with integrated antenna.
We also use some heating system to reduce ice load.
Here some other pictures..
Bye.
Awesome
Location, Prishtina Kosova.
I have some pictures on the beach with sand, girls, routeboard and my notebook. is it not the same?
Maximiliano
Intercity SRL
Rio Cuarto-Argentina
the biggest canopys private implementation of sudamerica
well post those too
Who took these pictures? Can we get permission to use one in our Dynamic DNS installer? I want to make sure we don’t use if copyright is going to be an issue.
Thanks,
Sam Norris
ChangeIP.com