Example 4 - Voip Over Vpn - Draytek VIGOR3300V+ User Manual

3.3.4 Example 4 - VoIP over VPN

Based on the VoIP Example 1(Basic Configuration and Registration), we will introduce
how to dial the VoIP call through an encrypted VPN tunnel.
In this example Vigor3300V+ acts as a bridge accepting incoming VPN connections from
the other two routers (Vigor2910V and Vigor2200V). The VPN traffic between Vigor2910V
and Vigor2200V are all passed through Vigor3300V+. These three sites internal networks
must be within the same subnet (192.168.X.X). Either site can ping the other two routers.
Then you can make a VoIP call through the encrypted VPN tunnel by directly dialing remote
router's LAN IP. Below shows the architecture graph:
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