jimasek wrote Maybe your electrical installation has separate circuits. He said adapter B could identify the other adapter A , It's not separate-circuits problem. Did your computer got IP from the...

I have bought one AV500 kit , 4010 used as the "source", 4220 pick it up to provide wifi in another room. I think your purpose can be achieved.

the answer maybe not ..

you connect the powerline wired or wireless?

Place a repeater to extend the wireless signal of 281 if there's a socket in between

I have learned that even the web interface says that the extender is connected, it's in fact not connect if the extender's IP is 192.168.0.254 (extender default IP address) I suggest u put your 850...