I am not sure if PCChips uses the same LAN Network Adapter Extension Bracket on different motherboard.
But the LAN bracket on M571LMR has a circuit board, it's not a simple passthrough

https://www.youtube.com/watch?v=6awMc5tHJAk

I have exactly that motherboard at work, in a box with a lot of old hardware I saved from being tossed. As sangokushi said, the Ethernet bracket has a PCB with not only the RJ45 header, but also a chip with the integrated isolation transformers. I'm on holiday until 21 January, but if by then you are still interested, I can take high resolution photos of both sides of the board, in case you want to replicate it.

Now that would be awesome. Thank you

davidmorom wrote on 2024-12-30, 22:25:

I have exactly that motherboard at work, in a box with a lot of old hardware I saved from being tossed. As sangokushi said, the Ethernet bracket has a PCB with not only the RJ45 header, but also a chip with the integrated isolation transformers. I'm on holiday until 21 January, but if by then you are still interested, I can take high resolution photos of both sides of the board, in case you want to replicate it.

Hi David

I am still very much interested in the close up. And if you could measure which pins on the pin header are connected to which pins on the transformator on the pcb, i would be very thankful.
Best regards

Don't worry, I didn't forget (I have it noted on my calendar), but I won't have access to the board until Tuesday 21, as I told in my last post. That very same day I will post photos of the board and the results of the continuity measurements.

davidmorom wrote on 2025-01-12, 21:38:

Don't worry, I didn't forget (I have it noted on my calendar), but I won't have access to the board until Tuesday 21, as I told in my last post. That very same day I will post photos of the board and the results of the continuity measurements.

you're the best

davidmorom wrote on 2025-01-12, 21:38:

Don't worry, I didn't forget (I have it noted on my calendar), but I won't have access to the board until Tuesday 21, as I told in my last post. That very same day I will post photos of the board and the results of the continuity measurements.

Hi again

so - I made it. Here is my working home made LAN Bracket. So I don't need the pictures or measurements anyway. But still : thank you for wanting to help me

I started out with this

And this is the other half

adegn wrote on 2025-01-16, 16:17:

Hi again […]
Show full quote

Hi again

so - I made it. Here is my working home made LAN Bracket. So I don't need the pictures or measurements anyway. But still : thank you for wanting to help me

The attachment LanBracket.jpg is no longer available

I started out with this

The attachment intact.jpg is no longer available

And this is the other half

The attachment otherhalf.jpg is no longer available

Is the NIC in second photo not compatible with your motherboard? Just wondering why you need to cut a working NIC to make the lan bracket?

sangokushi wrote on 2025-01-16, 20:48:

Is the NIC in second photo not compatible with your motherboard? Just wondering why you need to cut a working NIC to make the lan bracket?

yes - but I have only two PCI slots - one with a Riva TNT and one with a USB 2.0 card. And I have the onboard Davicom NIC - so it was quite obvious to do this. It might not be the most beautiful hack - but it does the job - and 100mbit PCI NICs are highly available.

Impressive! Very nice "brute force" work, glad you made it work!. Just for curiosity, how did you find out the correct pin out, by trial and error? There are 5 cables, so I assume they are TX+, TX-, RX+, RX- and GND?

davidmorom wrote on 2025-01-21, 09:59:

Impressive! Very nice "brute force" work, glad you made it work!. Just for curiosity, how did you find out the correct pin out, by trial and error? There are 5 cables, so I assume they are TX+, TX-, RX+, RX- and GND?

Gnd is actually not connected. I took a look at the schematics of the transformator. The tx and rx + and - were quite easy to find. I don't know what the last one is called, but it is somehow 0 but not gnd. That one is connected to pins 3 and 14 on the transformator. I thought it was gnd and had it connected to gnd on the Mainboard - and it didn't work. But when the wire accidentally fell off, it connected.
Tx are connected to 1 and 2, Rx to 3 and gnd is 5 and the 0 level is 4 on the pin header.