I dont know that i can meant my problem on topic.
We set up vc systems with polycom devices.
RPCS RPRM RPAD DMA etc.
RPAD has an ip address : 192.168.10.115
This ip address mapped on firewall a public address.
But we have some mpls networks from outside of our networks.
they want to call us via these mpls networks via rpad.
We set up some setting
I added schema as an attacment.
Not sure of the entire set of requirements you have as part of this solution . However it appears the RPAD is supposed to sit between 2 firewalls with multiple external networks( Internet & MPLS) .A solution I could suggest is to have a "DMZ Deployment with One or More Network Interfaces" i.e. if the RPAD has atleast 2 network interfaces deployed in the Enterprise DMZ then both signaling and media services can be assigned to different interfaces for internal and external call flows . In this way you can keep the solution simple . Also you can assign upto 4 external proxy IP addresses . There is also a table you can fill out to map the external and internal signalling and media .
Please refer to Page number 67 for the configuration details:
Hope this helps!