using 2 internet connections

[Ish]

Hi

The network consists of:-

ADSL internet connection No 1 via a Draytek 2820 router
ADSL internet connection No 2 via a Draytek 2820 router

SBS 2011 server
Server 2008 server
Phone server
60 IP phone handsets
60 desktops

All equipment is connected via unmanaged switched and all DHCP is via Draytek router No1.

How would we set this up so that all the internet traffic from the phone server is via internet connection 2 and everything else uses internet connection 1?

 

[Ish]

On the Draytek 1 each LAN port is setup as a VPN

VPN 0 - SBS 2011 server and dekstops
VPN 1 - Server 2008 server and desktops
VPN 2 - Wifi AP's
VPN 3 - All the phones and the phone server. VPN 0, 1 & 2 can see this VPN as well.

The Draytek 2 isn't doing anything at the moment so how do I connect it to the network so it doesn't conflict with Draytek 1 and also how so I get the phone server to use it for internet?

One idea I was given was to put 2 network cards in the phone server and connect it to both Drayteks?