What kind of board is this?

Came across this video:

https://www.youtube.com/watch?v=qfsZakorLyk

And saw that the board has what looks like two ethernet ports and a headphone jack? Is it some kind of electronic board?

Really? Doesn't look like anything DGT sells, mind linking me something? 

Here is another video where they use these boards:

https://youtu.be/sAmh1olrrSw

Never heard of DGT producing an eboard with two Ethernet ports for its interface. I could only guess that it’s a final prototype available within Russia only. If anyone can offer any more details, please share with the rest of the community. 

Looks like a chosen standard for a regular blitz meet somewhere in Moscow.

https://www.youtube.com/playlist?list=PLznVt58Tqxro2mt4XMPiBmuiJp26uOeBK

After looking at what it takes to run a tournament of 12 DGTboards, I figured that these were DGT boards made specifically for tournaments to reduce the cabling needed to connect the 1st board to the 2nd through 12th boards. See the parts kit for a serial eboard below: COM-to-ethernet, ethernet cable and splitter!