Routing towards session-agents with same IP, different ports

Hello all,

I would like to ask, how it is implemented routing on ACME when I have 2 session-agents with the same IP but different ports, on different realms/sip-interfaces.

I have following configuration, 2 session-agents on access side,

     one session-agent: sa-test-1 on realm access and sip-interface access with IP1

     second session-agent: sa-test-1-ws on realm access_ws and sip-interface access_ws with IP2 (IP1 and IP2 are different of course :-))

session-agent

        hostname                                sa-test-1

        ip-address                              192.168.10.50

        port                                    5060

        realm-id                                access

 

session-agent

        hostname                                sa-test-1-ws

        ip-address                              192.168.10.50

        port                                    5062

        realm-id                                access_ws

But when i send call from core side towards sa-test-1-ws (INVITE R-URI has format like this:  INVITE sip:421123456789@192.168.10.50: