As you will know i am developing new module for Kamailio and i'll commit on main project as soon as. Let me give more news about this module later. 

But i wanna to share with you one thing, if you were in my shoes, what do you to found out duplicated signalling? I don't mean retransmision messages.

Let's go to question: In kamailio, you could get a copy of signalling message that is generated by siptrace module in other one kamailio. We know it would be send some signalling messages twice or more in duplicate( I mean 180Ringing, 200OK or etc), How we could found out them? Actually i must do it in module not do in cfg configuration.

Would you please give me a suggest? I really need a sugest with no extra overhead.

With regards.Mojtaba