I have a switching module that is installed in a 2811 router. I am serving DHCP from the router and using access vlan 40 and voice vlan 400 for the phones. When the switching module ports are in trunking mode, the phones work fine but when a PC is plugged into the PC port of the phone, the PC's cannot access vlan 40 for data. When trunking is turned off on the ports and the PC's are plugged directly into the switch, they work fine. Does anyone have any experience with these switching modules that install in the router?? Help...Thanks in advance!