Any powerline ethernet expertise?

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Joined 2002
Trying to make powerline ethernet work to a room that makes hard cabling very different.

The first try was putting one of the units next to the main junction box. Logically, this would mean the shortest distance between units (if rooms were on different circuits). This worked for a while and LED indicated strong connection, but eventually the ISP cable modem, nearby, got screwed up and required a reboot.

Now trying a more remote location, working but LED indicating poorer connection.

Any insight as to how these work?
I assume the main panel is a bad location because it is close coupled to inductive appliances that hinder its operation?
How did the cable modem likely get screwed up, RF through the power cable or radiated?
Would better power filtering for the cable modem help things or make things worse but putting inductance on the line?

Any help appreciated. TIA
 
It may help to get a power strip with mostly filtered outlets and one unfiltered outlet. The unfiltered outlet is used for the powerline ethernet adaptor; the filtered outlets are used for all other equipment which may malfunction due to the high-frequency signal that the powerline ethernet adaptor injects into the AC mains.

Usually, at least two such power strips will be employed, one at the sending side and one at the receiving end.
 
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The experience I have with modems / routers and related gear is:

Every couple of days they get tired and need a reboot.
This happens more with the cheap ones installed by the ISP's.
Newer powerline adapters rely on the PE earth connection, so make sure Your outlets are grounded. I believe this is to overcome the different Phase connection on three phase systems.
The speed advertised is the sum of both download & upload speed, so a 1000Mb is in fact a 500+500 not counting with transmission overhead packets. Be happy if You get 350-400 Mb speed.
They don't like power strips. Connect them directly to a outlet.
They also don't like UPS's since the spike filtering inside attenuates the signal.

Check You ground with an incandescent low wattage say a non LED fridge lamp in order not to trip the main GFI.
Connect between PE & Live. If it doesn't light bright, call Your electrician.
I've successfully transmitted one time powerline internet from my garage to my loft.
The signal goes thru two main switchboards. On every floor there is one. I've done it with older Devolo 200Mb adapters which don't use the PE wire..
 
Thanks for all the tips. Seems to be working in remote location, acid test will come as my daughter uses it for online school, will soon be obvious if better than wifi. I have some pretty fancy line filters to try out, but they have spade lugs which are a pain so don't want to bother if little chance of helping.
 
In 20 years
I'm pretty sure there was a power failure / outage during that time.
I'm pretty sure the PSU of the modem needs some servicing. New caps perhaps or ask Your ISP for an updated cable modem.

I assume the main panel is a bad location
I remember reading folks installing caps bridging phases for signal pass.
But the real problem is the meter. Signal doesn't go thru, thank God.


Forgot one thing on my last post.... Sometimes the Powerline adapters also get tired and need to be power-cycled.

Have You tried to update the powerline firmware already ?