Thanks for the help. After setting up new bridge and changes in firewall, ISDN telephony now works!

Andrej

I bought Mikrotik Router RB2011ILS+SFP module with intention to have just all-in-one hardware for my private network and get rid of Milan switch from ISP. Before the replacement of Milan switch with Mikrotik router I had optic fibers connected to Milan switch and from that switch 3 eth cables out: 1...