hi all

I am trying to develop  the interface between PNA and PS,that is PEN interface,
for that  i am using the one openser 1.2 as the PNA Application server and Presence server.

I already developed sh interface between HSS and the PNA.
After getting the PNR request from HSS,PNA has to send the PUBLISH message to PS

so here my doubt is

1.How to connect the PNA and PS
2.how to construct PUBLISH XML body
3.can i use the opensips/openser as presence network agent
 
thank you
regards
suresh