Consider the following scenario, I have one site (my site) with an Asterisk server and then I have another site (my clients site) they too have an Asterisk server we have a permenant VPN tunnel.
I would like to be able to make a call to one of my clients exentions but without using the ISDN lines etc, as if I were calling an internal number.
Perhaps if I had a dialing code before their extension etc
Any advice or where to start reading would be greatly appreciated.
Hope that made sense!