I started this new thread - since my last one improperly blamed the AirRouter as the troublemaker.
Note: this specifically addresses those with concerns about feeding power into the Nano XW backwards - into the Secondary jack (trying to use just one ethernet cable during DTD applications).
I took pics showing the bypassing of the "Main" & "Secondary" port power switching transistor. I did this on a few Nanostations well over a year ago; during the BBHN dayz (when the secondary port was not only data inactive, but no power supply voltage on the Secondary port either).
See the red jumper; jumping the pins 4&5 on the Main RJ45 - to the same pins on the Secondary RJ-45.
"Backfeeding" voltage from that Secondary port (through a FET junction) is no longer a fear. I had just performed the same "jump" on a NanoStation XW, and it all worked fine; testing both situations.... the NanoStation as a primary stand-alone node with ethernet cable to the Main connector (DHCP enabled) ....... and then with the NanoStation having DHCP disabled, plugging the NS Secondary port to the POE (this as the lone ethernet cable going to the NS), and the LAN on the POE going to an AirRouter HP port 4.
As long as you use just one ethernet cable to the XW Nano. and always routed through a POE ... you're in like Flint !
a little reminder for next years field day
Thanks, David