I have small network of approx 100 pc's, pix 501, catalyst 4503, and a catalyst 3560 that serves approx 8 of those pc's. I have 7 vlans. We do right much h323 video conferencing and those devices are attached directly to the 4503 in their own vlan. Is there anyway to make sure this vlan or packets have priority over the others? If so, is this accomplished through the 4503 or at the individual unit settings? Or, is QoS only configured for trunk links, and the h323 packets dont pass through a trunk? Thanks in advance.