"This doesn't really need to be separate VLANs. You can have the phone router and the network router on the same subnet, assuming you can disable DHCP for both of them. You just have a single DHCP server give the phone router as a gateway for phones and the network router as a gateway for computers.
With that said, all you need are switches which support VLANs. The switch will let you put each port on a (set of) VLANs, so you would set eg your phone ports on VLAN 1 and everything else on VLAN 2. This is best if you want well defined ""phone"" ports rather than letting phones be plugged in anywhere."
