The problem manifests itself as follows: I connected it, set it up, spread it over the floors, everything seemed to work. But as soon as you turn on any equipment with a power supply (DVR, video camera) next to the outlet where the "Powerline" is located, the connection immediately broke. Complained to tech support. They said it was a problem with the machines. I removed all involved circuit breakers from the wiring diagram, and lo and behold, it's been two weeks without a break in communication. The power supplies stopped responding. Fortunately, the new house is not yet completely plastered. I will lay a separate cable with sockets. Internet cable is not an option, you need a large spread of WI-FI around the area around the house.
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