The url say :
The Catalyst 6000 and the Catalyst 4000 switches support a special multiservice port to connect to the Cisco IP phones. The Catalyst 3500 series XL switches provide the same level of functionality as the multiservice ports using the standard IEEE 802.1Q trunk ports.
I want to know when I configure voice vlan in catalyst 3550, the interface should be configure as catalyst 3500 xl(trunk port) or catalyst 4000( access port)? Can someone give me some doc about how to configure catalyst 3550's port to forward voice and data traffic on different virtual LANs ?