hi All,
We have recently deployed a CUCM + h323 voice gateway for our enterprise.
We now need to integrate a 3rd party pabx overseas(our counterpart) so that we can make calls with each other.
Is SIP trunk the recommended way to do this? if so how
I understand that we must point to each other's UC IP, but then our UC network is behind a firewall
How do we exactly connect? One way would be to establish site to site VPN to the our overseas counterpart.
Is there any other recommend practice; without purchasing more equipment/devices?
Appreciate any advise