To minimize the risk of unauthorized persons using the voice messaging or automated attendant systems to make toll calls, administer the voice ports on your Communication Manager server in any of the following ways.
Assign a Low Facilities Restriction Level (FRL)
The Communication Manager server treats all the PBX ports used by voice mail systems as stations. Therefore, each voice mail port can be assigned a COR or COS with a facilities restriction level (FRL) associated with the COR or COS. FRLs provide eight different levels of restrictions for automatic alternate routing (AAR), automatic route selection (ARS), or world class routing (WCR) calls. They are used in combination with calling permissions and routing patterns and/or preferences to determine where calls can be made. FRLs range from 0 to 7, with each number representing a different level of restriction (or no restrictions at all).
The FRL is used for the AAR, ARS, or WCR feature to determine call access to an outgoing trunk group. Outgoing call routing is determined by a comparison of the FRLs in the AAR or ARS routing pattern to the FRL associated with the COR or COS of the call originator.
The higher the FRL number, the greater the calling privileges. For example, when voice mail ports are assigned to a COR with an FRL of 0, outside calls are disallowed. If that is too restrictive, the voice mail ports can be assigned to a COR with an FRL that is higher, yet low enough to limit calls to the calling area needed.
Note Voice messaging ports that are outward restricted through COR cannot use AAR or ARS trunks. Therefore, the FRL level does not matter since FRLs are not checked.
FRLs can be assigned to offer a range of calling areas. Choose the one that provides the most restricted calling area that is required. The following table provides suggested FRL values.
Suggested Values for FRLs
| FRL | Suggested Value |
|---|---|
| 0 | Permit no outgoing (offswitch) calls. |
| 1 | Allow local calls only. Deny 0+ and 1800 calls. |
| 2 | Allow local calls, 0+, and 1800 calls. |
| 3 | Allow local calls plus calls on FX and WATS trunks. |
| 4 | Allow calls within the home NPA. |
| 5 | Allow calls to certain destinations within the continental United States of America. |
| 6 | Allow calls throughout the continental United States of America. |
| 7 | Allow international calling. Assign attendant console FRL 7. Note, however, that if Extension Number Portability is used, the originating endpoint is assigned FRL 7. |