[derane]

or a 30m ethernet cabel from PC1/room1 to floor to PC2/room2

keep it simpel

[pnnp]

Thanks Derane, Most of the tutorials I found only show how to share data between 2 computers via Ethernet cable. Like this one:

https://www.wikihow.com/Connect-Two-Computers-Together-with-...

For real time video call (Offline), it is not easy. I tried Linphone etc...