Maybe you have seen this strangeness before ? I stumbled across an issue where devices would not connect to Mikrotik Radios (wAP, cAP - Atheros). Turns out that Channels 7,8,9,10 don't work for us, we came across this where we were deploying a dozen wAP's using CAPsMAN and we had the system set to "auto" frequency. Channel 7 would sort of work with some stations but they would not pickup an IP address and association was flaky, others would not connect at all. In testing, we went through each channel by selecting the exact frequency, 2412, 2417 and so forth. Connecting to channels 1 through 6 and 11 were reliable. Other channels did not work at all. Using my WiFi analyzer, nothing was coming out of the Radio (7-10) (according to my laptops Radio). I reckon there was but the "incompatibility" was giving me a herring. I've tried with Spectralink SIP Handset, Apple Devices (Phone Tablet etc) and Dell equipment. The challenge now is to limit CAPsMAN to only (automagically) assign 1, 6 or 11 -- Best Regards Denis Hancock | Network Support | 1300 139 593 Skype denis.hancock.melbourne | http://www.samurai.com.au