Beautiful, love the history! Most likely, none of the techs that we work with would know that.

Though, we have a situation that the existing cables are mixed, some A, some B. everything worked fine for months. Now, we have problems. Have internet at modem, everytime we hook up modem to network, internet doesn't work.

Have feeling that a wrong device is plugged into an Ethernet port somewhere in house.

Or can it be, out of the blue, the mixed configs, are causing this, when they weren't before.

All cables test out fine.