hi modders is it possible to blacklist...

what i am trying to say is that. suppose i blacklist a contact number , that person is calling to me , what happen it will give a ring and then its says busy..


now when i put in line 2 , someone calling to me , nothing it says some peeps thats it..

so in mcleaner that blacklisted person calling to me , what the mcleaner have to do is ,it has to change to line to then to say busy , so so there wont be a ring... calling person cant identify that he is blacklisted.....