Network tone generator freezes when plugged into a particular ethernet port.
I use a Trendnet tone generator like below:
It generally works extremely well. But yesterday I plugged it into an ethernet port and the LED lights on it appeared to have faded. I plugged it back out again and immediately all the LED lights illuminated again. Obviously, I could not complete the network probe test because in this state it was obviously not emitting a "tone". What happened here? I've never seen it do this before.
(BTW, Looking at the front of this device it says "not to be used on live circuits")