I am using the router to hook up a SIP phone system on my LAN.
I have dual WAN connections, but only one is active and the second WAN is just for failover.

The Phone System needs to know its static IP, I am currently using the static IP provided to me by the provider of WAN1.
However when the failover kicks in, my WAN2 provider provides me with a different static IP address and my phone will discontinue functioning.

Can I configure the routerOS in a way that my phone system sees a static IP of 10.10.10.10 and that the RB750 will translate that through either static IP from WAN1 when WAN1 is up or static IP from WAN2 when WAN2 is up?

Is it possible? If Yes, how do I do that?

Regards, Gary