How to add a personal blacklist on U19XX?

Solution description :

You can use the below command to block any user from making any call to you and when he calls you he will hear the call barring voice file


Config add blacksubscriber userdn 33 blackdn 88


33 : My number


88 : The number that i need to block it

Solution verifications :

Any user try to call extension 33 --> call will work fine
User 88 try to call extension 33 --> he will hear call baring message , that he can not call this number

Credit: KarimUC