Budi, pls be more specific.
With static discharge, you probably think of one of these cases:
a) static discharge, while I'm handling the card: I'm handling a lot of cards and routers. Why is it only R52 on a few of them that can't stand my treatment ?
Hmm, this is maybe, but very little chance, it would be broken
after very long time, usually this damage would be show up
very soon in the field.
b) thunderstorm: We haven't had any this summer yet...
c) static energy generated from wind friction on the antenna etc - combined with the lack of proper grounding: If this is the case (and it could very well be), then why is the other card (a CM9) in the router for 5 GHz uplink not dying ???
Hmm, different grounding treatment ?
Different antenna, one dc-grounded, and one not dc grounded (that connected to dying card) ?
You would be better monitoring the situation, if other card
dieing in same antenna, better check :
- Your grounding situation for that antenna
- Are your antenna dc-grounded by design or not (ask the manufacturer) ?