Understood thank you for your advice. Will try this method later.

How is this complicated when it is a normal setup at every place i have been thru

Understood. So from this article i just need to declare vlan 3 qos priority 7.

So the command will be : -

vlan 3 tagged

vlan 1 untagged (i believe this will not be shown in the show config)

Correct me if im wrong.

Meaning i dont have to declare voice vlan 3 ? Just put tagged vlan 3 is enough from what you said correct ?

I want data vlan 1 and voice vlan 3. How to make sure my pc is getting default vlan while my phone is on vlan 3 (or voice vlan 3) ?

The dhcp is from juniper firewall. So no need to declare voice vlan ? Just trunk vlan 1 and 3 and manually set vlan 3 on each phone ? This is what you trying to say correct ?

The setup is isp > load balancer > juniper firewall > hpe switch

The pbx is connected to hpe switch. The phones is sharing data port with pc. Meaning data vlan and voice vlan should be together.

I want vlan 1 as data vlan and vlan 3 as my voice vlan.