Thanks Brian. All of my devices, pretty much are dual band. I'm running 994 now, and keep getting cannot communicate with... during a query...not on every device but a lot. Not sure about their built in communication test, how? Yes the 2413s is an old one that went out at one time. Replacements weren't available at that time so I replaced some of the troublesome caps and got it working, however, my work was not the best and I suspect it isn't 100%, lol.