This topic describes the restriction tables that can be used to prevent calls such as calls to long distance or international phone numbers.
These restriction tables exist by default:
- Default Fax
- Default Outdial
- Default System Transfer
- Default Transfer
- User-Defined and Automatically Added Alternate Extensions
All restriction tables disallow international and long distance numbers by default:
- Avoid security breaches, which may lead to massive toll fraud costs.
- Mailbox brute-force attacks with call transfer can be misused.
- Call handler transfer might be misused.
- Combine restriction tables with CSS on the voicemail ports or SIP trunk to allow or disallow certain types of calls.
Cisco Unity Connection comes with predefined restriction tables that can be modified but not deleted. By default, each restriction table prevents access to long distance phone numbers.
The following restriction tables are predefined:
- Default Fax: This table restricts the numbers that can be used for fax delivery.
- Default Outdial: This table restricts the numbers that can be used for message notifications. The table also restricts the user extensions that Cisco Unity Connection can dial when the phone is chosen as the recording and playback device in the Media Master.
- Default System Transfer: This table restricts the numbers that can be used for caller system transfers, which allow unidentified callers to transfer to a number that they specify. For example, callers might want to dial a lobby or conference room phone that is not associated with a Cisco Unity Connection user. By default, the table does not allow Cisco Unity Connection to dial any numbers.
- Default Transfer: This table restricts the numbers that can be used for Call Transfer.
- User-Defined and Automatically Added Alternate Extensions: This table restricts the numbers that can be offered as alternate extensions. For example, you can restrict a lobby or conference room extension so that users who frequently call Cisco Unity Connection from those shared phones are not automatically prompted to add the number as an alternate extension.