Hi group

I have been struggling to work out how to set up a multisite company with 
Astlinux.
Basically they want to have a central answering point but essentially all sites 
are autonomous e.g. each site has their own SIP service which is routed to the 
main site but used for outgoing calls from that site. I have SIP trunks set up 
between them and thats working fine however as their Internet connections are 
slow, I cannot afford to have hair pinning of calls or at least one hop only.

I first tried routing via the SIP trunk, but when the call is transferred 
(usually back to the original site) the call is hair pinned all the way to the 
Head Office and back. direct media does not fix the problem either.
I then though that I could remotely register extensions to each site on the 
head office console phone so the transfer is local to the remote system. Good 
thought but Im having lots of trouble having both a SIP trunk and a passthrough 
SIP extension on the same box.
My next thought was using the above idea but getting rid of the NAT problem 
with a VPN.

Does anyone have any other ideas. Im losing my hair.

Regards
Michael Knill




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