Disable specific extension on IVR ver 18.5

[AlexanderZ]

Hello all!
In my previous version I was able to block certain extension from being pressed on any IVR by an inbound caller, after the upgrade from 16 to 18.5, it doesn't work anymore.
I tried looking around for several days but nothing updated on how to do this on vr.18.5.

In the previous setup 16, I changed the perimeters of IVR_DIRECT_DIALING_GRAMMAR' from [0-9]{3} to ((?!899|900)[0-9]{3}) as seen on my posts but change make no difference now. I need to begin with blocking those two extension and build out from there once can see an example using 3 digit extension and blocking 899 and 900.

Can someone please help with details on where and how this now done on the new version?
Please advise
Thank you.

 

[Evolute IT]

CFD is probably the easiest way to allow only certain ranges of extensions.

 

[AlexanderZ]

I've tried CFD and frankly its much to difficult to setup, implement and use, there has to be other options and hard for me to believe something that use to work has been removed on the new version. Anyone else have suggestions?