https://community.hpe.com/t5/communications-and-wireless/hp-420-communication-problems/m-p/4583277#M7739 Hi Stephen, <BR /><BR />The error message that you've seen is usually caused by an interference in the 2,4GHz band or in some cases faulty hw. <BR /><BR />If you have any type of spectrum analyzer, you can run that to make sure there is no interference in the channel that your ap is using.<BR /><BR />Kind regards, <BR /><BR />Jouni Kosonen<BR /><BR /> Mon, 22 Feb 2010 17:25:45 GMT Jouni Kosonen 2010-02-22T17:25:45Z https://community.hpe.com/t5/communications-and-wireless/hp-420-communication-problems/m-p/4583276#M7738 Every so often I lose communications with random 420 devices. They'll respond to a ping, but not respond to telnet or web interface requests. The only solution I have is to reboot the device.<BR /><BR />I manage over 400 of these devices via PCM+ w/PMM. The devices are at 223 and 225.<BR /><BR /> Information: wlan0 beacon transmission problem at beacon #5872582! - no SWBAs seen!<BR /> Fri, 12 Feb 2010 18:14:57 GMT https://community.hpe.com/t5/communications-and-wireless/hp-420-communication-problems/m-p/4583276#M7738 Stephen Schickler 2010-02-12T18:14:57Z https://community.hpe.com/t5/communications-and-wireless/hp-420-communication-problems/m-p/4583277#M7739 Hi Stephen, <BR /><BR />The error message that you've seen is usually caused by an interference in the 2,4GHz band or in some cases faulty hw. <BR /><BR />If you have any type of spectrum analyzer, you can run that to make sure there is no interference in the channel that your ap is using.<BR /><BR />Kind regards, <BR /><BR />Jouni Kosonen<BR /><BR /> Mon, 22 Feb 2010 17:25:45 GMT https://community.hpe.com/t5/communications-and-wireless/hp-420-communication-problems/m-p/4583277#M7739 Jouni Kosonen 2010-02-22T17:25:45Z