double NAT--> VoIP issues

im doubt that anyone can help , because MikroTik is doing the job that supposed to be doing, however in the network there are +90 air cubes with NAT enabled by default (they do not suported SSH, so i cant log in to them).

The issues is that the end user is experiencing VoIP issues , i’m assuming that is because of double NAT is happening.

Anyone any idea? maybe MT can do somethign exstra?

You need to deploy CGNAT correctly on the ISP side, see this:
http://forum.mikrotik.com/t/how-to-edge-router-and-bng-optimization-for-isps/150007/1