I want to block internal calling in my cucm. Kindly help me to resolve this issue.
I want to block all incoming call from PSTN to Ext 3966-1200. I have success in this requirement through PT-BLCK patation and CSS-BLCK but my internal extension unable to call to 1200 number. My requirement is only 5555 extension is call to 1200 number, other number can't call to this number.