Well, for one, you obviously do not have "nothing else connected". There's your PC and its monitor right there, and there's an internet router or modem on the other end. Both of these are connected...

@delijohn A lot of what's being argued here is the usual misunderstanding of what's being advertized. Now "up to 1000 Mbit/s" refers to the gross channel bandwidth, and there's an "up to" in front of...

@delijohn Maybe you simply broke one of the cables - 100 Mbit/s works on two wire pairs, while gigabit needs all four intact.

@jaazz You're welcome. It's not about whether the PLC WiFi adapter can or cannot do this. The far end simply is the wrong place to do this Even if you could implement a guest network there, all the...

@jaazz That would actually be a feature on the main router. Some can dedicate one of their LAN jacks to the guest network, and then if you connect your PLC pair to that, the far end PLC WiFi will...

@Charles_G Sniff it. Does it have a chemical stench to it? Why am I asking this? Typical cause of death for these is their internal power supply failing, mostly due to cheap capacitors leaking and...