Hi,
Your Elastix is connected to the router in the same network with your existing Trixbox, right?
It is like this: ISP -----> Router ------> Switch -----> Trixbox
and your Elastix is in the same connnection:
ISP------->Router-----Switch---------> Trixbox
---------> Elastix
Now, what I need to know is if your Router configuration like port and IP forwarding is the same you did with your Trixbox in to the Elastix?
As for Trunking, have you set up a Registration string like, user:
password@voipprovider.com/callerID
What is your current configuration under sip.conf?
This is the basic configurations required to make this work in SIP trunking for you to send and receive calls.
Regards,
Jessie