Supervisors and administrators can prevent or allow calls to certain numbers such as international numbers or premium rate numbers for individual users or on a system-wide basis.
The system supports call barring at many levels. Short codes can be used at the system or individual user level to block the external routing of specific numbers or types of numbers. Typically the barring short codes are set to return busy tone, however they could route the call to an alternate number or to a Voicemail service that returns a ‘barred dialing message’.
Users can allocate short codes to a user rights template. The users can then apply the template to the users whose calls need restriction. Administrators can also bar the forwarding of calls to external numbers on a per user basis.