Second WAN/NAT for voip only - ISP

I need help to setup my voip WAN interface.

Currently my FTTH ISP offers two VLANs which one are used for Data and the second for voip.

Both are behind PPPOE
Wan : Vlan 835 - PPPOE -Default route - Nat
voip: VLAN 838 - PPPOE with pbit 5 - 4 specific routes - Also requires NAT
LAN: 10.10.0.0/24 - this lan will route everything through WAN and only voip subnets through VOIP vlan.

Currently I have setup:

  • Vlan interfaces 835 and 838
  • set priority for vlan 838
  • Setup PPPOE which both work and receive IP
  • Setup the static routes for second wan


    Example:
/interface vlan
add comment="FTTH Data Vlan" interface=bridge name="FTTH VLAN Data" vlan-id=835
add comment="FTTH Voice Vlan" interface=bridge name="FTTH VLAN Voice" vlan-id=838

/interface pppoe-client
add add-default-route=yes allow=pap disabled=no interface="FTTH VLAN Data" name="FTTH Data Dialup" user=user
add interface="FTTH VLAN Voice" name="FTTH Voice Dialup" user=gues

/ip route
add disabled=no dst-address=<sub1> gateway="FTTH Voice Dialup"

/ip firewall mangle
add action=set-priority chain=forward new-priority=5 out-interface="FTTH VLAN Voice"

/ip firewall nat
add action=masquerade chain=srcnat comment="defconf: masquerade" ipsec-policy=out,none out-interface-list=WAN

I have not tried yet to setup the second nat

What I read is I need connection-marks and route tables to make the setup work

How can I from my system access through the Voice dialup using masquarade?

Help would be appreciated.

I have seam issue I can’t configure VoIP and be sure no one hear will help us