We have all AP3605. Current firmware 09.12.01.0067. This has been happening with prior versions as well. They are connected to Enterasys B-Series switches (FW 06.81.01.0027) and occasionally, the AP will go offline with no lights, and I'm assuming no power. I try to turn power off to the port and then back on, but it does not come online. I have also tried in the past moving it to another port on the switch with no fix. What ends up getting it back online is rebooting the switch. Based on that it seems like a switch issue. This is not a regularly occurring issues, but when it does happen it is an issue because I have to bring down the whole switch to fix 1 AP. Any suggestion on where to look or settings to check?