I'm working on multiple Kamailios that have users distributed evenly among them, I now need to enable presence in those Kamailio boxes. The scenario is a mesh where any user may have subscribed to BLF of other user registered & calling on any other proxy. 

What modules can help me achieve this? can this be done without creating a new Presence-Node for the whole environment?

Hope to get some suggestions on how experts here have done this. 

Looking forward to positive response.

Regards,

Sammy