[mikester]

Well - unless you do a hardware VPN solution at your house to connect to the office then you really have to do the QOS at the office on the VPN device.

The reason is that if you use the PC to initiate the VPN connection the device that is providing connectivity is not going to see the VOIP traffic as it will be wrapped in a VPN tunnel packet. IT won't know how to provide QOS to it as a VOIP packet in that case due to the tunnel. IF you use a hardware device then it could possibly work as the device will see the traffic from the Phone application before it tunnels it out to your office.

Still - a switch isn't the answer - even if you buy a switch with these features you're buying a "multiylayer switch." Switches work on layer 2 - which is the network layer - the packet layer. They don't route via IP or any other protocol they switch packets based on mac address from one port to another simplistically speaking. A multilayer switch provides a 3rd or even higher funtionality by putting a routing ability into the switch. Layer 3 is IP and requires routing to transport. I'll try to draw up a diagram today showing you what I mean.