[Users] RPID and how it relates to CallerID

[Brandon Price]

Can someone please explain to me how RPID works under openser? I have  
some experience with SIP and Asterisk, but I am having some trouble  
manipulating the RPID variables under openser. How does RPID relate  
to Callerid or simple services like private calling, or anonymous  
call block. How do I tell openser to send all calls from a certain  
user with the privacy=full flag, I'm assuming this tells the sip  
proxy or UA on the other end not to present the callerid? Any help  
greatly appreciated.

-Brandon Price-