I am having problems extending a line from our pbx to a remote office. I have two audiocodes SIP gateways, I can get the calls to work inside our network, but am running into the SIP and NAT issue. I was thinking of just setting up a router in both offices to tunnel the traffic so the phones think they are on the same network. I am new to all the VPN stuff and would like comments/reccomendations to the easiest setup. I know this sounds bad, but I'm not too concerned about security on the tunnel, the voice traffic that will be going over it is nothing critical and will not be used that much.
This is what I am trying to do: