SIP trunk with registration at 3CX

[EvgeniyS]

Hello!
I've to connect a SIP voice responce system to my 3CX.
Problem is that this system can only register on external server.
And I don't know how to create a trunk with external system which registers on 3CX.
Is it possible in principle?

 

[TheodorosG_3CX]

Maybe you need to route traffic from your firewall here.