Basic Dual WAN Setup without Multipath

Hi All,

I'm trying to set up simple network with 2 WAN connection. 1 for data and 1 for voice.

As a learning exercise i'd like to set it up the more 'traditional' way using routes and nat before I start playing around with multipath.

I tried setting it up using masquerading like this ;

Data (Network) -> Provider.Data (WAN)
Voice (Network) -> Provider.Voice (WAN)

Then I set up and enabled a Standard Static Route as follows.

Type : Interface
Network : Voice (Network)
Interface : Provider.Voice (WAN)

Now this doesn't appear to work. With Cisco, this sort of stuff is dead easy so can anyone enlighten me as to what a I am missing?