There is a direct WAN connection, through an external layer 3 router in the branch, to the Main Office for VoIP bearer and as primary VoIP control connection. The layer 3 router is connected to the G430 through a dedicated VLAN interface.

The Broadband Internet connection uses cable or DSL modem, with a static public IP address

There is a VPN tunnel to the hub over the Internet for intranet data, and as backup connection for VoIP control

The local hosts access the Internet directly through the local broadband connection

The PSTN connection backs up the voice bearer