Hello,
My name is Rozana and i am an engineer from the SMB team.
Just a question, because i see no configurations attached.
When the auto voice VLAN is disabled, the ports that are connected to the phones are in Trunk mode with VLAN 40T 30U ?
Also when you enable the auto voice VLAN, and stating that VLAN 40 is the voice VLAN,
what is the status of the ports when you connect the phone + PC?
If you wish you can call our support line and we can arrange a Webex to troubleshoot this issue.
Regards.