|In order to help you, I'm going to have to gather some info from you.|
First, detail the configuration of your managed switch. Include all VLAN tags and their appropriate port assignments. Don't forget to detail the uplink port(s).
Is this in a home or work environment? If home, contact your provider. If work, are you using an internal VoIP controller or an external one?
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.