Technical information

Tools that Restrict Unauthorized Outgoing Calls
Issue 7 June 2001
4-17
For DEFINITY G3V2 and later releases, which includes DEFINITY ECS, an
additional COS option is available:
 Call Forward Off/On-Net: allows a user to call forward outside the switch
(Off-Net), or inside AND outside the switch to non-toll locations
(Off/On-Net).
For DEFINITY G3V4, the list call forward command displays all stations with Call
Forwarding On/Off Net Call Forwarding and Busy/Don’t Answer (BY/DA). This
display includes the initiating station and destination address.
For DEFINITY ECS Release 5, a default is in place that should help limit
accessibility to the Call Forwarding Off-Net capability. Specifically, the default
value for the “Restrict Call Forwarding Off-Net” field on the COS form is “y” for
every COS.
Also for DEFINITY ECS Release 5, COS can control the Extended User
Administration of Redirected Calls feature. To this purpose, the COS form
contains two fields: “Extended Forwarding All” and “Extended Forwarding B/DA”.
The default for both fields is “n.”
Facility Restriction Level (FRL)
FRLs provide up to eight levels of restrictions (0 through 7) for users of
AAR/ARS/WCR. FRLs identify where calls can be made and what facilities are
used. If the FRL of the originating facility is greater than or equal to the FRL of the
route pattern selected, the trunk group is accessible. The lower number FRLs are
the most restrictive for stations; FRL 0 can be implemented to provide no outside
access.
NOTE:
ARS/WRC route patterns should never be assigned an FRL of 0 (zero).
The FRL is used by AAR/ARS/WCR to determine call access to an outgoing trunk
group. Outgoing call routing is determined by a comparison of the FRLs in the
AAR/ARS/WCR routing pattern with the FRL associated with the originating
endpoint.
Authorization codes provide users with an FRL value high enough to give them
the calling privileges they require. Only users who enter a valid authorization code
with the appropriate calling privileges can override the lower FRL to gain access
to a long distance destination.
NOTE:
FRLs are not used if trunk groups have dial access allowed.