[SR-Users] Proxy topology question

[Greg Mannie]

Hello

After much reading I have come to the realization that after years of  
using Asterisk I know very little about Sip.

I have my Kamailio box up, I have Asterisk 1.8.x running with realtime  
working.  I thought it would be just a case of registering SIP trunks  
from my provider to the kamailio and registering our internal asterisk  
servers to the kamailio.

Much of what I read talks about using Asterisk as the PSTN interface,  
but that interface is through a sip trunk purchased from a provider.   
Won't Kamailio be the PSTN gateway?  The idea here is to pool all the  
sip trunks from the various hosted asterisk solutions (VM running  
asterisk) and point them all to a proxy to facilitate the aggregation  
of traffic.

I have been reading SIP tutorials and the mailing list archives.  If  
anyone has a sample config and perhaps a little direction it would be  
highly appreciated.

Thank you

Greg