Thanks for the reply!
Thanks for the clarification. I really enjoyed your description the the outhouse! We have put some gear in some pretty crazy mountain top locations ourselves but we try to keep the routers in more accessible locations (also cuts down the solar power budget) and just put radios on the mountaintops. BTW, we are in Idaho.
Thanks for your interest. The configuration is a MT RB 112 configured as a hotspot router with 2 2.4GHz cards in the PCI slots. One wireless card is a backhaul and the other is for the Access Point. We originally had an Atheros and a SR2 in the setup and then we tried two Atheros cards. Both setups showed the same problem: When ambient temps dropped to < 10 deg F we started seeing lost packets and dropped pings. We would lose contact with the routerboard. By pinging both the routerboard and the BackHaul radio we determined that it was BH radio that was falling out... at least first. Clients also fell out from the AP side. As soon as the weather warmed up all was well again. I don't know if some of this trouble was from the close physical proximity of the cards? Definitely temperature was the trigger. This setup was mounted outside in an MT outdoor enclosure.
We are now planning to do some more setups with 2 PCI cards (SR5 and SR2) and I wanted to make sure that the hardware is capable of working in the cold. The new setups will be better (532A RB instead of 112) so we are hoping to get better results this time around.
It is good to know that you have tested these cards for cold weather and that others have had success.