I had the problem that I needed a connection from the floor to the EC, but they are connected to two different phases of the power lines. Therefore Powerlan adapter went only with a phase coupler.
The CoaxNet of Allnet was the solution! Simply connected between the TV and cable box and you've got a truly trouble-free network connection. Much trouble safer than Powerlan and much faster than the fastest Powerlan adapter.
Speed almost as 100Mbit Ethernet.
And the best, if the network is not active because the PC is turned off, for example, the unit goes to standby and takes less than 2 watts!
Really a perfect product!