That looks like a pretty nice device.

I was wondering how it would fit in with the devices that are provided by the ISP that already do the firewall/nat functions. For example, I know a lot of Charter cable customers who have a device that has wireless, firewall, NAT, and so on. My guess would be the Grandstream WAN port would connect to the cable modem with nat functions, and get an address (with those, customer's PC's get a 192.168.x.x or 10.x.x.x address) and then the Grandstream LAN port would go to the customer's PC (or inside switch) and acting as a DHCP server, would then assign the customer's inside IP's to computers.

Also, does anyone know how the QOS is in these? It was good to see you could specify upstream and downstream bandwidth.