I have 2 demo 3CX server boxes setup with a bridge through the 3cx tunnel.... I noticed that the lights on the switch they are both connected to start blinking like crazy when you establish the connection. I did a packet capture to see what was in the packets.... it is about 4 bytes of data that is the same from the each server. If you change the Tunnel password on the 3cx it changes the contents of these 4 bytes.... CAn anybody tell me what this traffic is and why is it so excessive...? ALso is there a way to tune so there is less? Can anyone provide a technincal explanation of what the tunnel is and how it is used with the Master/Slave Bridge? I also noticed that the slave server re-registers with the master server about every minute according to the server log... CAN this be changed? Thanks!!!