When you enable FAC through route patterns in Cisco Unified Communications Manager Administration, users must enter an authorization code to reach the intended recipient of the call. When a user dials a number that is routed through a FAC-enabled route pattern, the system plays a tone that prompts for the authorization code.
In Cisco Unified Communications Manager Administration, you can configure various levels of authorization. If the user authorization code does not meet or exceed the level of authorization that is specified to route the dialed number, the user receives a reorder tone. If the authorization is accepted, the call occurs. The name of the authorization writes to call detail records (CDRs), so you can organize the information by using CDR Analysis and Reporting (CAR), which generates reports for accounting and billing.
You can use FAC for colleges, universities, or any business or organization when limiting access to specific classes of calls proves beneficial. Likewise, when you assign unique authorization codes, you can determine which users placed calls. For each user, you specify an authorization code, then enable FAC for relevant route patterns by selecting the appropriate check box and specifying the minimum authorization level for calls through that route pattern. After you update the route patterns in Cisco Unified Communications Manager Administration, update your dial plan documents to define the FAC-enabled route patterns and configured authorization level.
To implement FAC, you must devise a list of authorization levels and corresponding descriptions to define the levels. You must specify authorization levels in the range of 0 to 255. Cisco allows authorization levels to be arbitrary, so you define what the numbers mean for your organization. Before you define the levels, review the following considerations, which represent examples or levels that you can configure for your system:
- Configure an authorization level of 10 for interstate long-distance calls in North America.
- Because intrastate calls often cost more than interstate calls, configure an authorization level of 20 for intrastate long-distance calls in North America.
- Configure an authorization level of 30 for international calls.
Incrementing authorization levels by 10 establishes a structure that provides scalability when you need to add more authorization codes.