[beckzayi]

Hi there
I am just wondering how to make a 3cx-to-3cx bridge (commericial version).

do i need 2 license keys for those two 3cx machines, or only 1 key is enough?

I used 2 keys to test it. But, the bridge line is unregistered. Basically, i use one 3cx machine as 'master', the other one as 'slave'. So, how to make it registered?

Thanks

[KrisHansen]

I would be thinking the router on the masters network needs to route SIP port TCP 5060 to the Internal IP of the 3CX server so the SIP requests are forwarded. Or if you set the slave to register by tunnel then the port is 5090. Also while youre in there RTP ports UDP 9000 - 9015 would be good to forward to 3CX server as well.