I have set up a 2900 series with 3 port based VLans as follows
Port 1 is the management Vlan - Vlan0 on lan1
Port 2 is the Voip Vlan - Vlan 1 on lan2
Port 3 is the Voip Vlan - Vlan 1 on lan2
Port 4 is the Network - Vlan 2 on lan3
Port 5 is the Network - Vlan 2 o Lan 3