I have a Mitel 5201 plugged into a CIsco 3560G. I can see it attempting to lease from the Cisco switch (DHCP wise), but once the address is handed to the phone, it appears to time out. I have the switchport configured as follows: interface GigabitEthernet0/20 description Mitel 5201 - Configuration must be as follows switchport access vlan 10 switchport voice vlan 100 srr-queue bandwidth share 10 10 60 20 srr-queue bandwidth shape 10 0 0 0 queue-set 2 mls qos trust device cisco-phone mls qos trust cos auto qos voip cisco-phone spanning-tree portfast spanning-tree bpdufilter enable spanning-tree bpduguard enable end Any/all assistance is greatly appreciated