[OpenSBC] OpenSBC as registrar for Asterisk

[OpenSBC F. <ope...@op...>]

Hi I am new to using OpenSBC. I want to implement this kind of setup. I want to ask if it is possible. If it is possible will anyone with a kind heart give me a headstart on how to set it up. Here is my kind of setup


SIP Clients-------Internet ------- OpenSBC ------- Asterisk---- PSTN


My Sip extensions are configured in my asterisk box. I want to hide Asterisk from the outside world so I want my SIP Clients to register in OpenSBC with the accounts configured in Asterisk. Can OpenSBC do this? Do I have to add local domain users in OpenSBC? or Can OpenSBC do the registration for Asterisk. 


 I hope someone would be able to help me with this I have search google for any information about this setup but to no avail. 


 Thank you very much in advance..