Hi, I just purchased 2 GPeR Ethernet PoE extenders.
I have the jumpers attached on both sides, but when I plug the PoE-In side into my PoE switch, the device does not power on at all. Is this the expected behaviour? Or are these defective units?
Thanks for any advice.
Insufficent details.
GPeR don't do 802.3 af/at/... handshake by them selves, they depend on the remote device doing it. If remote device doesn't do it, then PSE (PoE switch) has to be set-up to provide power without handshake (forced on).
From the manual
Ethernet port accepts passive PoE or 802.3af/at DC 24 - 57 V⎓.
Passive not active though.
So these devices are confirmed DOA.
I wouldn't say so ... did you try to force power out on PoE switch?
As I explained, devices won't do 802.3 af/at PoE negotiation ... but will gladly accept power if/when provided.
As far as I'm concerned, he didn't even read your previous answer because he didn't like it...
I think we can say that these GPERs are "passthrough" devices.
If you apply on one side passive poe (forced on) there will be passive PoE on the other side.
If you apply on one side 802.3af/at, the connection is "transparent" and IF you connect on the other side a device capable of completing the 802.3af/at negotiation, THEN there will be PoE on the other side.
Imagine that INSTEAD of a GPER you have a simple RJ45-RJ45 coupler connector like:
Yea right, that makes sense. However I do not require PoE on the other end, its switch to switch.
Therefore, I assume (documentation is a little bit limited here) that I would remove the jumpers on the side I do NOT require PoE.
I dont understand this, so its Passive or Active?
I’ve tried multiple methods to power the devices, Switch, injector. Nothing powers it up.
But are you using passive power supply with mode B?
It Is particularly badly documented, but It seems like It "likes" (like MOST Mikrotik devices) Mode B.
See:
GPeR
Ok thanks,
So, yes this works with a passive PoE injector. Kind of misleading but powered it up with a gigabit PoE passive PoE injector and I now have a Gigbit link and a link I previously has 100, so its doing it job.
Little confusing and a little misleading but its working! Thank you for your help!
To be fair, a whole lot more than a little, I really cannot understand why the good Mikrotik guys (that seem like very good in both the hardware and RoS) fail so miserably when it comes to doccumenting their devices and their OS.
It seems like - instead of writing down documentation - they believe they are writing a newspaper ad (where you pay a fee for each word).
Anyway, good that the thingy works fine now. 
