Please help me,hichic,huhuhu!

[lequan]

I found that Asterisk have some strange features and services like : Privacy, Open Settlement Protocol (OSP) and Overhead Paging. I can not find that what they are and how they work…
Anybody can help me find them up,thanks so much.

[jsgoecke]

voip-info.org/wiki-Asterisk

and of course:

google.com