Hi,

I have 2 router mikrotik.
First: VPN 10.10.10.1 (172.16.10.0/24 Local)
Second: VPN 10.10.10.102 (172.16.12.0/24 Local)

the avaya PBX is locally into 172.16.10.201
the phone is ringing but no sound
i tried to check the connection
the connection is going to avaya but when comes out the destination ip chenged to be local
i tried to make dst-nat but no way.

make sure that you don't NAT over the VPN tunnel.
no sound or one-way-audio typically also means that the audio is hitting a firewall rule, check those as well

How do I route to VPN without NAT?

I only find example with NAT and my im thoughts are that I need the normal entry in IP-Route to the VPN and tag/point in Mangle to the route of theVPN.
Till now I always needed a SRC-NAT to gateway of the VPN.