Asterisk different IP segment with mikrotik router

Helo guys

i want to ask about NAT for the my asterisk server in the mikrotik.

that is my topology, i want to configure NAT on the mikrotik router, so that it can be work ip to asterisk server i think something problem with my NAT configuration, please help me… thanks before

Why do you need NAT? Even if you have a WAN link between 2 routers you can still do regular routing.