Hi,
I am trying to communicate 2 Jitsi clients in 2 separate private networks.
Both clients are behind NAT. 
Kamailio Server is on Public IP.
Both Jitsi clients  does register and presence works fine. And also text messages works well. 
But unable to call each other.
Had some one had the same issue before. I tried with many soft clients and all failed with same result.

Same scenario works with IP Phones.
Can anybody point out what I miss there.

Regards,
Roy.