Comtrend PG-9172POE Powerline Ethernet +PoE Adapter

I don't write many reviews but I had a real need for a product like this. We have IP phones that run off PoE and many WFH users running long 25' wires back to their routers. With these products, it was a snap to plug one module near my router and the other near my phone. There really was no other configuration needed. Phone booted up and works great. The 2 modules are only ~15' apart. I would like to test moving them to opposite sides of the house and on a different circuit. Not sure if that matters or not? So far very happy with this purchase and will advise my firm to make many more purchases.

Completely my fault for not doing the research, but be aware that this powerline adapter is not compatible with the vast majority out there on the market.

I thought it would come in a pair, considering it was $70. The product doesn’t work without 2 of them. What a scam for these prices, it should be $60 for 2 of them.

I installed these in several rooms on different levels in our three level house in Seattle and they work great. I got these G.hn powerline units originally over the other powerline type (HomePlug) because that other type would not work in my detached garage to give my security camera network and power connection via PoE (power over Ethernet). The G.hn ones do work and have been running my detached garage camera for about 4 years now, continuously and without notable problems or interruptions. I bought a bunch of these when it looked like G.hn was going to lose the powerline battle but thankfully it appears that it has survived.

I don't know a single powerline ethernet bridge that (A) is able to push its marketed bandwidth or (B) is able to operate reliably. And these are no exception. Since pretty much all powerline ethernet bridges have issues, there's no point giving it 1 star. It works within my expectations, but it certainly isn't spectacular, so I'll give it three stars.For best performance you really only want to have two or three of these plugged in at most. Any more and they will start stomping over each other and both bandwidth and reliably will suffer greatly.It would be nice if these gizmos didn't try to constantly train their highest speeds and then drop-out for 20 seconds when it fails. I'd be much happier if they trained a reliable (but slower) speed and just stuck with it. And it would also be nice if they didn't try so blasted hard to deliver a single packet and wind up causing half a second of latency for everything running over the net. When it works:ping -s 512 -i 0.1 -c 200 BLAH200 packets transmitted, 200 packets received, 0.0% packet lossround-trip min/avg/max/stddev = 1.182/20.302/492.494/53.516 msAnd when it decides its gonna retrain for no reason, boom, drop-out for 50+ packets.200 packets transmitted, 141 packets received, 29.5% packet lossround-trip min/avg/max/stddev = 1.182/50.824/473.906/84.495 msThe protocol that thinks long dropouts are a good idea sucks, honestly. It would work so much better if it just slowed down a little and didn't drop-out in the first place.Update #1:I dropped it down to 1 star. These things are just so freaking frustrating and unreliable! I'm convinced that the problem is in the firmware. The idiots who built this protocol and did the firmware for these things don't know what the heck they are doing. Packets can buffer for 50 seconds (I can literally get a ping response to a sequence number I sent 50 seconds previously). It causes self-inflicted packet storms even when it manages to retrain. Often its working perfectly (sub 5ms ping) and boom, for no reason it just stalls out completely and decides to retrain. That isn't power-line noise, that's the firmware deciding to do something stupid. What a piece of junk.Update #2:Mei Culpa! I found the biggest source of noise messing up these powerline ethernet devices so I'm going to pop my rating up to 3 stars. I still can't give it 4 or 5 stars. The culprit turned out to be a Winix Aircleaner. But here's the thing... sure it has an AC fan, but the fan was on ultra-low and no special cleaning elements were turned on. So it kinda annoys me that just one of these winix's managed to destroy the house network.What I wound up doing was putting a fairly expensive Furman powerline filter on the Winix (thinking it might work in the opposite direction).. and it does! Now with Winix isolated, the house network is operating decently with these Comtrend devices.So I think... generally speaking, all of these powerline ethernet devices are really sensitive to other stuff plugged into your house, and sometimes it is due to things you least expect. But all is not lost! If you can find the offending items a good power strip EFI filter can prevent them from blowing up the house powerline ethernet network.Update #3:Back down to 2 stars... one of the units 'crashed'... got into a non-working state where it left itself disconnected permanently, requiring the unit to be physically unplugged and plugged back in to return to a working state. But other than that, the Furman powerline filters on other noise sources in the house did the job.-Matt