I have a client who has a VoIP phone system on the same subnet as all computers. Whenever music on hold is playing, the network slows to a crawl. The problem i am running into, is that there is one cat 5 jack in each office. Running off that jack is the phone as well as the computer. What would be the best way to configure a seperate subnet for the phones which would allow them to talk to the PBX (which is on the same subnet, but can/will be chagned to the new one).