MX WAN Trunk Port with multiple VLANS

[Jawad]

My ISP runs WAN link carrying Internet and Voice Vlans.
Voice vlan should be switched and Internet vlan should be NATed. I havent tried the setup yet, but lets say the wan port on mx is set to tag for internet vlan, and i configured a local vlan for voice traffic. Would voice vlan be switched from WAN port to LAN port?

Thanks

[Morgan]

You would need to connect the handoff from your ISP into a switch, then, you can switch the voice VLAN and create an access port for the WAN, then connect your MX internet port to that. The MX will allow a VLAN for the WAN interface, but will not pass a second VLAN through it. 

[Jawad]

Thanks.
What about connecting ISP link to MX LAN port configured as trunk and then loop it back to WAN port?

[Morgan]

Unless you create an interface on the MX, with an IP on that vlan, I don't believe that would work. You would really need a vlan capable switch to split the two vlan's.