internal-calls

Hello, I have an extension that is in a common area. We would like to limit that extension to only internal dialing and 911. Not sure how to do this. Could someone please point me in the right direction. Thanks,

Hi Folks, I have recently installed fusionPBX on Debian 8 system and created few domains on it. I have also created extensions for each domain but internal (Extension to Extension) calls were not working. When I dial on other extension I get error USER_NOT_REGISTERED even the user was registered...